I ran into this problem while trying to do the WTF Bootloader unlock and Root method, as well as the Frankenstein phone...All the steps should work, except I can't even get the thing to allow itself to be detected by my computer.
I have read others with the VS996 who have done the WTF / Frankenphone methods without this issue.
I have plugged it in to the computer as I have with Android phones forever; it says "Charging" and gives no option to switch to MTP/File Transfer etc... I also go into the Developer Options to try and change this, I tap the setting that would usually allow you to switch it, and it opens no menu and acts as if there isn't one to be accessed. I've tried my Win7 and Win10 machines - same results each time. Also does not allow me to change USB mode while unplugged, or even enter download mode! I am using the USB cable that came with the phone, and have also tried other cables. I've cleaned the port on the phone, tried all USB ports on BOTH computers - still nothing. I've ever master reset the thing hoping it was a glitch , but it still will not let me change it out of "Charging" or even act like there's the ability to do so.
Did Verizon lock these things down so hard that you just can't use them like normal Android phones?
I have searched to an exhausting extent, I'm out of ideas... I don't use Verizon, so I really need to figure this out so it doesn't keep thinking it's still being used on the Verizon network. My service works, but it constantly says the SIM is not a Verizon SIM, and won't provision certain services (such as Emergency Calling) ... HELP!
k2pdx said:
I ran into this problem while trying to do the WTF Bootloader unlock and Root method, as well as the Frankenstein phone...All the steps should work, except I can't even get the thing to allow itself to be detected by my computer.
I have read others with the VS996 who have done the WTF / Frankenphone methods without this issue.
I have plugged it in to the computer as I have with Android phones forever; it says "Charging" and gives no option to switch to MTP/File Transfer etc... I also go into the Developer Options to try and change this, I tap the setting that would usually allow you to switch it, and it opens no menu and acts as if there isn't one to be accessed. I've tried my Win7 and Win10 machines - same results each time. Also does not allow me to change USB mode while unplugged, or even enter download mode! I am using the USB cable that came with the phone, and have also tried other cables. I've cleaned the port on the phone, tried all USB ports on BOTH computers - still nothing. I've ever master reset the thing hoping it was a glitch , but it still will not let me change it out of "Charging" or even act like there's the ability to do so.
Did Verizon lock these things down so hard that you just can't use them like normal Android phones?
I have searched to an exhausting extent, I'm out of ideas... I don't use Verizon, so I really need to figure this out so it doesn't keep thinking it's still being used on the Verizon network. My service works, but it constantly says the SIM is not a Verizon SIM, and won't provision certain services (such as Emergency Calling) ... HELP!
Click to expand...
Click to collapse
No, Verizon hasn't locked this down.
You said you've already Master Reset your phone, so that's very strange.
I know you tried different computers/different cables/different ports -- but the only thing I can suggest is to try other different computers.
Plenty of VS996 owners on here have Frankenstein their phones. Some then reverted back to VS996 TWRP flashable zip, after bootloader unlock and root, to regain Verizon VoLTE as they are Verizon customers. But no one has had any trouble with USB connections.
ChazzMatt said:
if you are not using Verizon, you need to Frankenstein your phone to US998 or H933 firmware. For bootloader unlock and root, you need US998 firmware.
Plenty of VS996 owners on here have Frankenstein their phones. Some then reverted back to VS996 TWRP flashable zip, after bootloader unlock and root, to regain Verizon VoLTE as they are Verizon customers. But no one has had any trouble with USB connections.
No, Verizon hasn't locked this down.
1) I know you tried different computers, but other different computers.
2) Since either Frankenstein or WTF bootloader unlock is going to re-set your phone anyway, go ahead and do that now PRE-EMPTIVELY. Maybe going back to factory defaults will fix something.
Click to expand...
Click to collapse
I've factory reset. The problem is, it won't let me switch from Charging mode to File Transfer / MTP mode. It doesn't detect the computer and the computer doesn't detect it - doesn't give an option to switch USB mode, etc... See attached screenshots - that's what it looks like while connected to USB no matter what cable or PC it is connected to.
I'm actually trying to Frankenstein the phone, but can't even get past the part where the phone and computer need to communicate via USB because of the problem I'm having.
So I guess, has anybody ever had this problem and found out how to fix it? It's all I need so I can Frankenstein the phone.
ChazzMatt said:
No, Verizon hasn't locked this down.
You said you've already Master Reset your phone, so that's very strange.
I know you tried different computers/different cables/different ports -- but the only thing I can suggest is to try other different computers.
Plenty of VS996 owners on here have Frankenstein their phones. Some then reverted back to VS996 TWRP flashable zip, after bootloader unlock and root, to regain Verizon VoLTE as they are Verizon customers. But no one has had any trouble with USB connections.
Click to expand...
Click to collapse
I am finding this very strange too.
I don't have anymore computers to try.
Is it possible that it's still somehow tied to Verizon? It was recently used by a friend who gave it to me when he upgraded to a new phone. My calls / data work (I have to manually provision that) so it seems very odd that it won't full allow services / USB connections or even show the OEM Unlock option in the Developer Options.
k2pdx said:
I've factory reset. The problem is, it won't let me switch from Charging mode to File Transfer / MTP mode. It doesn't detect the computer and the computer doesn't detect it - doesn't give an option to switch USB mode, etc... See attached screenshots - that's what it looks like while connected to USB no matter what cable or PC it is connected to.
I'm actually trying to Frankenstein the phone, but can't even get past the part where the phone and computer need to communicate via USB because of the problem I'm having.
So I guess, has anybody ever had this problem and found out how to fix it? It's all I need so I can Frankenstein the phone.
Click to expand...
Click to collapse
I was editing my reply as you were replying. You had buried the important parts see the bottom, what all you tried.
No one else has any problems, to my knowledge. Tons of VS996 on this forum, who have Frankenstein'ed to US998 either permanently or temporarily to Bootloader Unlock and root.
All I can suggest is to try yet other PCs?
Other VS996 users can chime in, but I don't remember any reports of USB issues over the past couple of years.
ChazzMatt said:
I was editing my reply as you were replying. You had buried the important parts see the bottom, what all you tried.
No one else has any problems, to my knowledge. Tons of VS996 on this forum, who have Frankenstein'ed to US998 either permanently or temporarily to Bootloader Unlock and root.
All I can suggest is to try yet other PCs?
Other VS996 users can chime in, but I don't remember any reports of USB issues over the past couple of years.
Click to expand...
Click to collapse
I noticed that too, haha.
So isn't it supposed to let you switch USB mode even if not plugged in? When mine is plugged in or not, it acts as if the only option is "Charge" - if you look at the screenshots I attached, I've pull my top menu down where it should have a way to switch it from Charging to something else, but even that shows nothing... just charging, settings etc
I tried calling Verizon customer service just to see if they have some kind of security measure they sent over the air when my friend deactivated it from his account - but they're close, probably because of this COVID 19 thing (or they don't work on Sundays)...
@schwinn8, @nnjimmy59, @gimpy1
you all don't have any USB connection problems on your VS996, do you?
That's just three off the top of my head. We also had a Dev, TotallyAnxious who had VS996 for awhile and a very popular Anxious V30 mod -- but moved on to a newer phone a few months ago.
Never any mention of USB issues.
ChazzMatt said:
@schwinn8, @nnjimmy59, @gimpy1
you all don't have any USB connection problems on your VS996, do you?
Click to expand...
Click to collapse
Well, my phones were not originally VS996. My personal phones were US998 purchases. The next two I purchased were H931. All of these converted via Frankenstein just fine. (One H931 had some issues, unrelated to the process - I believe it was a hardware problem with Verizon towers). That phone is now US998 running on ATT with no issues.
My wife and I are still running VS996 with no issues. I don't use USB much but I know it worked just fine last time I used it. I'm happy to test further if needed, but it sounds like this may be more of an issue with an originally-VS996 phone, as the OP is suggesting.
EDIT: To be clear, I don't think this is a real problem with the phone... probably just another "incompatible" computer/cable/USBport thing. So many people have these types of issues, and there's no guaranteed answer on what does/doesn't work. I'm happy to help if I can, though... I still have my older laptop which did all these steps just fine. I will say my new laptop (Ryzen) does NOT work on this process. I still have that older machine, in case it's needed again. If you love in the CT area, I'm happy to help first-hand...
schwinn8 said:
Well, my phones were not originally VS996. My personal phones were US998 purchases. The next two I purchased were H931. All of these converted via Frankenstein just fine. (One H931 had some issues, unrelated to the process - I believe it was a hardware problem with Verizon towers). The other is now US998 running on ATT with no issues.
My wife and I are still running VS996 with no issues. I don't use USB much but I know it worked just fine last time I used it. I'm happy to test further if needed, but it sounds like this may be more of an issue with an originally-VS996 phone, as the OP is suggesting.
Click to expand...
Click to collapse
OK. I'm pretty sure the others had original VS996, especially TotallyAnxious. I'm not going to officially mention her as she has moved on, but we communicated a lot when her Magisk mod was posted here.
schwinn8 said:
Well, my phones were not originally VS996. My personal phones were US998 purchases. The next two I purchased were H931. All of these converted via Frankenstein just fine. (One H931 had some issues, unrelated to the process - I believe it was a hardware problem with Verizon towers). That phone is now US998 running on ATT with no issues.
My wife and I are still running VS996 with no issues. I don't use USB much but I know it worked just fine last time I used it. I'm happy to test further if needed, but it sounds like this may be more of an issue with an originally-VS996 phone, as the OP is suggesting.
Click to expand...
Click to collapse
I'm thinking it's probably because it's an original VS996 and Verizon is notorious for locking down their phones, even though they are carrier unlocked.
It wouldn't be a problem if I could just force the USB to work and get rid of all the Verizon programming...I'm really hoping someone out there has had to deal with this before and see this.
ChazzMatt said:
OK. I'm pretty sure the others had original VS996, especially TotallyAnxious. I'm not going to officially mention her as she has moved on, but we communicated a lot when her Magisk mod was posted here.
Click to expand...
Click to collapse
I'm gonna have to read through TotallyAnxious' old posts in hopes a solution can be found. Otherwise, not sure this phone will work for me.
k2pdx said:
I'm thinking it's probably because it's an original VS996 and Verizon is notorious for locking down their phones, even though they are carrier unlocked.
It wouldn't be a problem if I could just force the USB to work and get rid of all the Verizon programming...I'm really hoping someone out there has had to deal with this before and see this.
Click to expand...
Click to collapse
Sorry for the later edits... but as I mentioned, if I can help in some way, I'm happy to do so (see my previous post).
https://forum.xda-developers.com/lg-v30/help/v30-detecting-usb-cable-vol-power-t4067993
The post above is the closest I can find - but the phone I have never had any errors leading up to the problem.
schwinn8 said:
Sorry for the later edits... but as I mentioned, if I can help in some way, I'm happy to do so (see my previous post).
Click to expand...
Click to collapse
I'll go back and re-read your posts again. (edited below after re-reading)
It's probably also worth mentioning that it won't enter Download Mode following the instructions found here : https://droidrecovery.com/lg-v30-recovery-mode/ (scroll down to "Boot LG V30 into Download Mode")
-edit- As far as incompatible cable/computer theory - I don't know...it's the cable that came with the phone when it was new. My other cable was from a Samsung Galaxy and both work with my Moto X4 (which is what I'm switching to the V30 from). All drivers are installed, no driver errors in Device Manager, etc...This is by far the most difficult phone I've tried to work with.
k2pdx said:
I'll go back and re-read your posts again. (edited below after re-reading)
It's probably also worth mentioning that it won't enter Download Mode following the instructions found here : https://droidrecovery.com/lg-v30-recovery-mode/ (scroll down to "Boot LG V30 into Download Mode")
-edit- As far as incompatible cable/computer theory - I don't know...it's the cable that came with the phone when it was new. My other cable was from a Samsung Galaxy and both work with my Moto X4 (which is what I'm switching to the V30 from). All drivers are installed, no driver errors in Device Manager, etc...This is by far the most difficult phone I've tried to work with.
Click to expand...
Click to collapse
The button dance is notoriously difficult to get right. Try it a few times. Note, in the steps listed, it says to release then press the power button again... but it's not clear that you need to HOLD it, not just press it. At least, that's what I remember it to be. I only had to do it once... adb is so much easier.
I also want to point out that one of my original LG cables did not work either. Not sure why, but it didn't. The other one did... as did a third party cable. Again, the key for me was my older laptop. The new one does not work, no matter what I try. Granted, when I say it doesn't work, I mean it wouldn't do the unlock... the USB does detect fine and the phone does switch into the necessary USB mode.
Can you change the USB mode manually somewhere? Maybe it was set to "charging only" by mistake at some point? I think the popup asks and has a "remember" button... if that was selected, it may be continuing to use charge-only by default?
EDIT: Found it... in settings/system/developer options there is "select USB Configuration"... set that to PTP and see if that works to get you in.
schwinn8 said:
.EDIT: Found it... in settings/system/developer options there is "select USB Configuration"... set that to PTP and see if that works to get you in.
Click to expand...
Click to collapse
I attached a screenshot in an earlier reply that shows what that looks like for me - I tap it and it does (literally) nothing. No menu, no option to switch - nothing at all - and that is actually the reason I posted here to begin with. I've never had this happen. It continues after multiple factory resets as well, and on the same computer I've successfully flashed other phones with.
This may be relevant? Maybe it's a Pie problem?
https://www.reddit.com/r/lgg6/comments/dnq719/usb_file_transfer_option_gone_because_of_android/
Different phone, but same symptoms.
Hi. Not sure if I can help any. But, here goes. I am on a Verizon vs996. Been a Verizon customer for years, still am. I have four phones on my plan, but I am the only rooted one. I rooted my phone about a year and a half or two years ago via Chazz 's Frankenstein method first, then the WTF method second. I currently use, for some time now, US998 rom (pie).
I did experience a couple of problems, but, carefully using/following all the instructions listed, got it done. My computer (at the time a surface pro 3 with windows 10) would not work for me. I finally borrowed an older laptop with windows 7, I think. That worked like a charm. No problems with it.
Other problems I personally had was understanding what the instructions actually meant for me to do, as I am not computer literate. I remember I had a hard time figuring out how to put the downloaded files into a folder in the correct location so the computer could find it. It really wasn't hard, I just didn't know exactly what they wanted or meant to do it.
Another problem was understanding how to use the "command" prompt. I had to click on something other than the command prompt (it was either a newer or older name for it - can't remember which). But, once I got it figured out, everything went smoothly and flawlessly. Somebody (ChazzMatt(?)) had linked to a different suggestion - can't remember what it was - but that worked.
What I would do now and what I did was, go in and print out the instructions. Once they are printed out, go thru it line by line, word for word and cross out everything that does Not apply to your phone, situation, etc. Read the remaining instructions over slowly and make sure what you are reading (and thinking) is exactly what the instructions say.
Messing with your phone can be very nerve wracking. It was/is for me, every time I do it. That's why I would print out the instructions and follow them exactly.
Sorry that's all I can add. I have to have exact explicit instructions and follow them (dummy mode).
As far as the button dance, I have never had a problem getting into twrp using it when changing roms. Magisk seemed to never install the first time and I could only get into twrp by using the button dance.
The reply to that reddit thread says that another user has it working in Pie. I wonder if you just have some weird corruption on your phone. I think you said you did a factory reset, correct? What I might suggest next is to try the Verizon repair process (they have some software that can supposedly reload the OS or something, as I recall). Maybe that will get you to a running state again.
And, again, try the button dance again a few times... I know it's annoying but it may work. If that gets you into download mode, you can then drop a KDZ for Oreo (or just jump into the Frankenstein method)... and you should be good? It's certainly weird that you can't get in there...
EDIT: Looks like not being able to access this setting does seem to affect a few phones on Pie... a quick google search confirmed this: https://www.google.com/search?client=firefox-b-1-d&q=android+cannot+change+usb+mode
Another thing to try - open up device manager, then plug in the phone and see if the list refreshes. This will tell you that Windows is "seeing" the phone, and maybe you can find out what driver it's trying to use. Maybe that's the problem? If it doesn't refresh at all, I would still suspect the cable...
Another post saying the same general thing: https://forum.xda-developers.com/pixel-2-xl/help/pixel-2-xl-usb-preferences-greyed-t3838058
EDIT2: You might also see if there's an app that can help you... like this one, for example: https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=en_US
schwinn8 said:
The reply to that reddit thread says that another user has it working in Pie. I wonder if you just have some weird corruption on your phone. I think you said you did a factory reset, correct? What I might suggest next is to try the Verizon repair process (they have some software that can supposedly reload the OS or something, as I recall). Maybe that will get you to a running state again.
And, again, try the button dance again a few times... I know it's annoying but it may work. If that gets you into download mode, you can then drop a KDZ for Oreo (or just jump into the Frankenstein method)... and you should be good? It's certainly weird that you can't get in there...
EDIT: Looks like not being able to access this setting does seem to affect a few phones on Pie... a quick google search confirmed this: https://www.google.com/search?client=firefox-b-1-d&q=android+cannot+change+usb+mode
Another thing to try - open up device manager, then plug in the phone and see if the list refreshes. This will tell you that Windows is "seeing" the phone, and maybe you can find out what driver it's trying to use. Maybe that's the problem? If it doesn't refresh at all, I would still suspect the cable...
Another post saying the same general thing: https://forum.xda-developers.com/pixel-2-xl/help/pixel-2-xl-usb-preferences-greyed-t3838058
EDIT2: You might also see if there's an app that can help you... like this one, for example: https://play.google.com/store/apps/details?id=co.vincze.usbsettings&hl=en_US
Click to expand...
Click to collapse
All I need is download mode and I'm ready to get this thing going, haha.
One of my computers detects the phone (it thinks the USB port can't supply enough power when I plug the phone in) but not as the device it is. The Windows 7 machine - nothing.
-edit- I tried that app just now and all it does is detect Android version and then if it's 6.0 or above, sends me over to Developer options. Seems like it just skips the part of going to it via the Settings menu... (indicates this phone is not supported by the app, based on the app's notices.
-edit2- Can someone link me to a video or screenshot walkthrough for the button dance? I may just be doing it wrong based on reading it, and the only videos I can find are for old Moto phones. Is that the same 4 corner thing?
edit3- I'm looking for anything Verizon may have to rebuild the OS...if anyone has some insight as to exactly where I can find this, that would be great.
When I attempt to enter "download mode" (same method as mentioned in a previous post) as suggested by one of the Verizon program that can repair it, the phone just charges and never enters any special mode.
Related
Hey there XDA, ive been having an issue with my GSII T989 that i hope you can help me with.
I originally got the phone off ebay used as a replacement for my T499 that had a broken loudspeaker (couldnt hear calls or use alarm)
It came with the stock TMO version of 4.1.2. Im on the monthly 4G plan with TMO and my old phone didnt have any way to stop tethering so i was able to use it freely. I still do not feel it necessary that i should have to give TMO an extra $15 per month to use this feature, so naturally i avoided it as much as possible. in 4.1.2 the "tethering provision" app was disable-able, so i Initially planned to keep that on the phone, however the phone kept getting the update to the newest software pushed to it and i couldnt get the notification to go away. rather than upgrade to another rom that would inhibit tethering, i decided to put a custom rom on it.
After looking over a few, i decided to go with AOKP. at this point the phone was fully functional. I was able to copy all the related files to the phone over USB. I initially loaded the CWRM 4.0.4.3 and that went smoothly
of course when i attempted to load AOKP i hit a roadblock as i had not updated the Radio. i got the radio and copied the file over to the phone while it was in recovery mode, and then loaded the rom up. everything seemed to be great, until a few days later.
I tried plugging my phone into my PC to copy a photograph off of it to post online, and it wouldn't work. Initially i figured it might have been a problem with the cable i was using. Since it was used, the phone came with an off-brand cable. I tried my OE cable for my T499, still nothing.
eventually i went and enabled "USB debugging mode" in developer options, and then it worked! I thought that seemed really weird, but at least i could still get into it.
that was a few weeks ago. Now i have been thinking about trying another rom, and now i cannot get the USB media mode to work on my phone at all, on any of my PCs, whether in normal, USB Debug, or in recovery mode. I even tried converting to the touch version of CWRM to see if something was wrong with that, and it still wont connect. The PC detects the phone but it refuses to show the storage. when i Enable USB debugging mode, it connects and shows the media device, but promptly disconnects again a few seconds later for no apparent reason. It even did this with Kies running. Everything else on the phone works as it should and it has no trouble charging from a wall jack or from the usb cable.
If you guys could help that would be great
T-Mobile SGH-T989
AOKP 4.3, CWRM 4.0.4.3
32GB SDHC
I hope you've meant 6.0.4.3 CWM instead of 4.0.4.3. That's old-old-old-old-old, and 99% likely to not work with today's ROMs and etc. What I would do is try to setup ADB on your computer and use that to push/pull files from your phone for in cases like this where the phone or computer doesn't like MTP. I highly recommend using this guide to setup ADB if you're going that route.
Edit: Spelling and wording to make more relevant (Skimmed through and missed the point of the last paragraph).
I bought my s3 in March of this year, and everything was working just fine until May. It's an awsome phone and I love it. However, since May, my phone no longer connects to 4g EVER and the 3g comes and goes and never stays connected for more than 10 minutes while in use. I've NEVER even come CLOSE to reaching my plans provided 2.5GB of data, so I know that's not the issue. The phone has never been dropped, or wet, as I am always very delicate with my phones. I have never placed it too close to the TV...
I contacted Boost mobile. They gave me a long list of things to try. I have tried EVERYTHING: making sure the mobile networks is checked, preferred network setting CDMA/LTE, soft reset, clear browser cache, update PRL, profile update, software update, firmware update, ##72786#, and even did a factory reset. Nothing helped. Boost said there was nothing else they could do for me, and that I needed to contact samsung.
Samsung said the only way for them to find the problem is for me to send them my phone, and wait 2 to 4 weeks for them to revise it and send it back. That's not an option as I need my phone monday through friday for my job. (UPDATE: I got so irritated with this problem that I went ahead and bought an LG Volt, since I didn't have the money to buy another galaxy. It's nice but I don't like it as much. I'm still afraid to send the Galaxy into Samsung. They have expressed to me that if they can't find an issue(just my luck), or if they find the issue to be my fault(IE I put the phone too close to a credit card magnet or some dumb crap like that), then they will charge me not only for the parts and labor, but for the return shipping... and we all know that they'll charge me way more than the phone is worth.
I was just wondering if anyone else has had this problem, and if there's anyway to fix it without having to send my phone in to samsung? I have been told, also, that I could try reflashing the phone to it's original firmware and software, but I am afraid of screwing the phone up since I've never done anything like that before.
Thanks!
First off, Welcome to the forms.
Secondly, you came to the right place. On this form you'll find crazy people like me who like to do custom flashing updating all the technical stuff. And then there's section of the form where people just want a normal phone and just want the basic troubleshooting tips. As with any user will have to search through the forms because there's a high likely chance that someone already has or had your issue just at different time.
There could be multiple reasons as to what you're experiencing. First off I think you should confirm and verify that you will do live in a good 3G or 4G location so that any further test can be actually validated. Secondly if you're not being able to connect to data it seems that you need to reactivate your phone by getting back on the boost/Sprint network. A full factory restore with data wipe and then updating over the air with firmware, PRL, reboot should work. Make sure you are set to use LET, under mobile data, and that you have enabled Automatic connections to the tower. Reactivate the phone again, if still not connected, reboot.
If you're still not having connection and I think you probably need to do a reflash via ODIN. This is pretty much what Samsung would do I'm except they have their own proprietary tools. Here on XDA we just have great developers.
Good luck.
Thanks button if this helped.
ChocaHermosa said:
I bought my s3 in March of this year, and everything was working just fine until May. It's an awsome phone and I love it. However, since May, my phone no longer connects to 4g EVER and the 3g comes and goes and never stays connected for more than 10 minutes while in use. I've NEVER even come CLOSE to reaching my plans provided 2.5GB of data, so I know that's not the issue. The phone has never been dropped, or wet, as I am always very delicate with my phones. I have never placed it too close to the TV...
I contacted Boost mobile. They gave me a long list of things to try. I have tried EVERYTHING: making sure the mobile networks is checked, preferred network setting CDMA/LTE, soft reset, clear browser cache, update PRL, profile update, software update, firmware update, ##72786#, and even did a factory reset. Nothing helped. Boost said there was nothing else they could do for me, and that I needed to contact samsung.
Samsung said the only way for them to find the problem is for me to send them my phone, and wait 2 to 4 weeks for them to revise it and send it back. That's not an option as I need my phone monday through friday for my job. (UPDATE: I got so irritated with this problem that I went ahead and bought an LG Volt, since I didn't have the money to buy another galaxy. It's nice but I don't like it as much. I'm still afraid to send the Galaxy into Samsung. They have expressed to me that if they can't find an issue(just my luck), or if they find the issue to be my fault(IE I put the phone too close to a credit card magnet or some dumb crap like that), then they will charge me not only for the parts and labor, but for the return shipping... and we all know that they'll charge me way more than the phone is worth.
I was just wondering if anyone else has had this problem, and if there's anyway to fix it without having to send my phone in to samsung? I have been told, also, that I could try reflashing the phone to it's original firmware and software, but I am afraid of screwing the phone up since I've never done anything like that before.
Thanks!
Click to expand...
Click to collapse
You could definitely flash the stock ROM and kernel to your phone via ODIN. However, the safest and most foolproof way to do this would be to download Samsung's KIES software here: http://www.samsung.com/ca/support/usefulsoftware/KIES/JSP
Once in KIES, you would plug in your phone to the USB port and, if needed, download any drivers for your phone. Then, you would follow this path: Tools --> Firmware Upgrade and Initilisation. This will give you a warning that you will lose all your stored data on the phone, and will offer you to make a backup -- a very limited backup -- of information on your phone. If you don't have any worthwhile information, I'd skip the backup and go right to stock ROM restore.
Hope this helps.
tO rcatank, I have already done all of those things. I have a new phone (which I don't like as much) that is connected to 4g almost always.
Higgs_Boson said:
You could definitely flash the stock ROM and kernel to your phone via ODIN. However, the safest and most foolproof way to do this would be to download Samsung's KIES software here:
Once in KIES, you would plug in your phone to the USB port and, if needed, download any drivers for your phone. Then, you would follow this path: Tools --> Firmware Upgrade and Initilisation. This will give you a warning that you will lose all your stored data on the phone, and will offer you to make a backup -- a very limited backup -- of information on your phone. If you don't have any worthwhile information, I'd skip the backup and go right to stock ROM restore.
Hope this helps.
Click to expand...
Click to collapse
I download KIES onto my computer or the phone? The phone already has something called "KIES Air" on it, is that the same thing? And then one I download the KIES software and hook up my phone and go through the prompts you've provided, it does the rest itself?
ChocaHermosa said:
tO rcatank, I have already done all of those things. I have a new phone (which I don't like as much) that is connected to 4g almost always.
I download KIES onto my computer or the phone? The phone already has something called "KIES Air" on it, is that the same thing? And then one I download the KIES software and hook up my phone and go through the prompts you've provided, it does the rest itself?
Click to expand...
Click to collapse
No, Kies Air is not the same thing. To do a stock restore, you have to hook it up to Kies on your PC via USB. Follow the steps I showed you, follow the steps on the screen, and Kies will take care of the rest.
Higgs_Boson said:
No, Kies Air is not the same thing. To do a stock restore, you have to hook it up to Kies on your PC via USB. Follow the steps I showed you, follow the steps on the screen, and Kies will take care of the rest.
Click to expand...
Click to collapse
+1 on this
Higgs_Boson said:
No, Kies Air is not the same thing. To do a stock restore, you have to hook it up to Kies on your PC via USB. Follow the steps I showed you, follow the steps on the screen, and Kies will take care of the rest.
Click to expand...
Click to collapse
Ok, thanks very much! One more question though... does it matter that the galaxy is no longer activated? I mean, obviously to test it to see if it works I'd have to re-activate it. But for this process, does it need to be activated?
ChocaHermosa said:
Ok, thanks very much! One more question though... does it matter that the galaxy is no longer activated? I mean, obviously to test it to see if it works I'd have to re-activate it. But for this process, does it need to be activated?
Click to expand...
Click to collapse
Without it being activated, I don't think you'll be able to receive data of any kind. In order to test 4G capabilities, you are probably going to need to reactivate.
But, to restore it via Kies, no activation is necessary.
Hello,
For the past few days, all of a sudden, I am unable to connect my One Plus 3 to any computer. Phone is running OOS 4.0.2, stock recovery, no root.
Tested in two systems running Windows 10, Kubuntu and Windows 7 in which I was able to connect and transfer files to and fro earlier.
The phone is getting charged when connected to computer.
USB debugging is enabled, drivers have been installed and reinstalled. When connected to computer, there is no notification in the notification shade or the status bar that the phone has been connected. so cannot pull down notification shade to change the connection type.
The system also does not recognise the phone and there is no information displayed about phone in the Windows Explorer side menu.
adb devices in normal mode and fastboot devices in bootloader mode do not throw any results at all.
Under Select USB configuration, toggling or cycling through the options (Charging, MTP, PTP etc) has no effect and it stays on Charging all the time.
I have checked with original data cable that came with my phone, with a micro usb cable attached with usb c adapter and also with another original cable borrowed from a colleague.
Any help would be greatly appreciated.
Thanks.
Buddy,
restart your phone, enable developer options, disable OEM unlocking and enable usb debugging. Connect your phone and choose 'transfer files' mode on the phone.
Go to My computer<My devices<MTP devices will show up<double click<update driver<choose install from system<install the MTP usb option and install driver.
It worked for me. Let me know if it works
Dipinn Verma said:
Buddy,
restart your phone,
It worked for me. Let me know if it works
Click to expand...
Click to collapse
Hello,
Thanks for your help.
I took this to the service center, where they diagnosed this as a mother board problem !!! Apparently due to rooting !!!!!!! Which would void the warranty !!!!!!!!!!!!!
After raising a stink, since the device was under warranty they accepted and replaced the mother board without any extra charge.
Funny enough that a representative of Oneplus himself concurred rooting will lead to mother board getting damaged and also about the warranty being voided if software was changed / altered!
anyways, phone is now getting connected . so problem solved.
Dipinn Verma said:
Buddy,
restart your phone, enable developer options, disable OEM unlocking and enable usb debugging. Connect your phone and choose 'transfer files' mode on the phone.
Go to My computer<My devices<MTP devices will show up<double click<update driver<choose install from system<install the MTP usb option and install driver.
It worked for me. Let me know if it works
Click to expand...
Click to collapse
Hello my friend,
I have the same problem when I try to connect the OP3 to my computer, so how I enable developer options? I have the last version o system operative.
Thanks
albertfs78 said:
Hello my friend,
I have the same problem when I try to connect the OP3 to my computer, so how I enable developer options? I have the last version o system operative.
Thanks
Click to expand...
Click to collapse
Settings<about phone<tap build number 8 times
you will developer options enabled in the settings menu
pvramk said:
Hello,
For the past few days, all of a sudden, I am unable to connect my One Plus 3 to any computer. Phone is running OOS 4.0.2, stock recovery, no root.
Tested in two systems running Windows 10, Kubuntu and Windows 7 in which I was able to connect and transfer files to and fro earlier.
The phone is getting charged when connected to computer.
USB debugging is enabled, drivers have been installed and reinstalled. When connected to computer, there is no notification in the notification shade or the status bar that the phone has been connected. so cannot pull down notification shade to change the connection type.
The system also does not recognise the phone and there is no information displayed about phone in the Windows Explorer side menu.
adb devices in normal mode and fastboot devices in bootloader mode do not throw any results at all.
Under Select USB configuration, toggling or cycling through the options (Charging, MTP, PTP etc) has no effect and it stays on Charging all the time.
I have checked with original data cable that came with my phone, with a micro usb cable attached with usb c adapter and also with another original cable borrowed from a colleague.
Any help would be greatly appreciated.
Thanks.
Click to expand...
Click to collapse
Go to about Phone.... And Press build Number 6/7 Times.. back to settings and Find out Dev mode.. If not work... Than do a factory reset... if not solved.. than follow Oneplus 3 Hardbrick Rom Flash method ?
pvramk said:
Hello,
Thanks for your help.
I took this to the service center, where they diagnosed this as a mother board problem !!! Apparently due to rooting !!!!!!! Which would void the warranty !!!!!!!!!!!!!
After raising a stink, since the device was under warranty they accepted and replaced the mother board without any extra charge.
Funny enough that a representative of Oneplus himself concurred rooting will lead to mother board getting damaged and also about the warranty being voided if software was changed / altered!
anyways, phone is now getting connected . so problem solved.
Click to expand...
Click to collapse
This is a lie. Rooting can't damage the motherboard since much of your system actually has root capability. It's just that your apps have been denied.
Now, if you used root to overclock the cpu and turn off the hardware thermal throttling then, yes, but that's not from rooting, it's from being stupid.
Oneplus always allows rooting
Sent from my ONEPLUS A3000 using Tapatalk
---------- Post added at 08:43 AM ---------- Previous post was at 08:39 AM ----------
albertfs78 said:
Hello my friend,
I have the same problem when I try to connect the OP3 to my computer, so how I enable developer options? I have the last version o system operative.
Thanks
Click to expand...
Click to collapse
Everyone PLEASE STOP TELLING PEOPLE TO ENABLE ADB when you have MTP problems. They are not related in any way. You do not need developer options to use MTP. Stay out of menu items you don't understand.
The most likely cause is that your Windows is confused. Plug your phone into a friend's Linux machine to see she the issue is at.
Sent from my ONEPLUS A3000 using Tapatalk
uudruid74 said:
This is a lie. Rooting can't damage the motherboard since much of your system actually has root capability. It's just that your apps have been denied.
Now, if you used root to overclock the cpu and turn off the hardware thermal throttling then, yes, but that's not from rooting, it's from being stupid.
Oneplus always allows rooting
Sent from my ONEPLUS A3000 using Tapatalk
OT Post below:
Of Course, I did know about that.
But the "Senior Tech" in the One Plus Experience Store insisted that the website explicitly informs rooting and unlocking bootloader will void warranty. He even went to the extent of opening said page to point out the fact. But the very first line in the web page was that the warranty will NOT be void !!
Next he tried dodging by saying that line was meant for OnePlus One and not for any other phones !!!!!
Only on further escalating the issue to the OnePlus Rep in the store, could I make any head way.
Again, the One Plus employee still toed the same line that the ambiguous lines were meant for the OPO and not for OP3, but he caved in to change the mother board.
All this leaves a bitter taste in the mouth for sure...........
Click to expand...
Click to collapse
You should be thankful that the oneplus guy does not say that windows broke youre phone..
pvramk said:
Only on further escalating the issue to the OnePlus Rep in the store, could I make any head way.
Again, the One Plus employee still toed the same line that the ambiguous lines were meant for the OPO and not for OP3, but he caved in to change the mother board.
All this leaves a bitter taste in the mouth for sure...........
Click to expand...
Click to collapse
Well, you have to remember that Oneplus is in China, and my guess you aren't nearly anywhere near China. There are idiots everywhere and I would have raised a huge scene. The problem is that you can't just take your business elsewhere, so you have no leverage and it's in their best interest to try and convince you to pay. It has been asked on the forums about rooting the Oneplus 3 and the official word from a Oneplus employee, not some stupid repair tech, was that rooting did not void the warranty, but if you send in a phone that was rooted, they would first determine if you did something to it as root that would screw it up (like disabling throttling) and if your actions as root damages the phone, it would not be covered by the warranty. Rooting doesn't void the warranty if the fault is Oneplus hardware.
Sent from my ONEPLUS A3000 using Tapatalk
null0seven said:
You should be thankful that the oneplus guy does not say that windows broke youre phone..
Click to expand...
Click to collapse
Lol yeah dodged that bullet.
Well not only OnePlus, but it's just my opinion, I guess all service centre techs are of a similar mould... Get defensive right from get go, try to blame it on the user and get out of a sticky situation. There might be exceptions but the service centre guys for any electronic purchase i have made invariably have tried to blame me first for any service request !!
uudruid74 said:
Well, you have to remember that Oneplus is in China, and my guess you aren't nearly anywhere near China..........
Rooting doesn't void the warranty if the fault is Oneplus hardware.
Sent from my ONEPLUS A3000 using Tapatalk
Click to expand...
Click to collapse
Well I'm from India (Bangalore, where we have the "Experience" store)
And of course beyond a limit where they started treating me like an idiot, I did have to behave like a .... Rhymes with "tick" and starts with a "D" to get the attention of someone higher up.
I'm yet to understand why this issue cropped all of a sudden. I did root the phone and install a custom ROM but after nougat went the stock route, which was what I tried explaining initially, that the phone worked normally for a while after installing stock but suddenly got weird, to the tech guys who of course ignored it... The hardware issue came up 'after' a while after installing stock nougat.
Another gem the one plus rep uttered which I had not mentioned earlier:
He acknowledged there is a problem in the motherboard,. Now get this: even though they (OnePlus) had a way of reverting the hardware changes made by using a specific software they were not authorised to give it to level 2 service tech. Hence they decided to change the motherboard !!!!
At this point I was too tired of OP guys' B.S. to even care and went along with it as long as my issue was cleared.
pvramk said:
Well I'm from India (Bangalore, where we have the "Experience" store)
And of course beyond a limit where they started treating me like an idiot, I did have to behave like a .... Rhymes with "tick" and starts with a "D" to get the attention of someone higher up.
I'm yet to understand why this issue cropped all of a sudden. I did root the phone and install a custom ROM but after nougat went the stock route, which was what I tried explaining initially, that the phone worked normally for a while after installing stock but suddenly got weird, to the tech guys who of course ignored it... The hardware issue came up 'after' a while after installing stock nougat.
Another gem the one plus rep uttered which I had not mentioned earlier:
He acknowledged there is a problem in the motherboard,. Now get this: even though they (OnePlus) had a way of reverting the hardware changes made by using a specific software they were not authorised to give it to level 2 service tech. Hence they decided to change the motherboard !!!!
At this point I was too tired of OP guys' B.S. to even care and went along with it as long as my issue was cleared.
Click to expand...
Click to collapse
You should report this to Oneplus in China. Likely, the experience store is a contracted 3rd party and oneplus needs to set them straight.
And yes, hardware issues can sometimes take awhile to creep up. This is more common in Chinese parts, but that's how you get stuff cheap!
Sent from my ONEPLUS A3000 using Tapatalk
pvramk said:
Hello,
For the past few days, all of a sudden, I am unable to connect my One Plus 3 to any computer. Phone is running OOS 4.0.2, stock recovery, no root.
Tested in two systems running Windows 10, Kubuntu and Windows 7 in which I was able to connect and transfer files to and fro earlier.
The phone is getting charged when connected to computer.
USB debugging is enabled, drivers have been installed and reinstalled. When connected to computer, there is no notification in the notification shade or the status bar that the phone has been connected. so cannot pull down notification shade to change the connection type.
The system also does not recognise the phone and there is no information displayed about phone in the Windows Explorer side menu.
adb devices in normal mode and fastboot devices in bootloader mode do not throw any results at all.
Under Select USB configuration, toggling or cycling through the options (Charging, MTP, PTP etc) has no effect and it stays on Charging all the time.
I have checked with original data cable that came with my phone, with a micro usb cable attached with usb c adapter and also with another original cable borrowed from a colleague.
Any help would be greatly appreciated.
Thanks.
Click to expand...
Click to collapse
This is not just a problem for OnePlus 3. It's a general bug for most Windows systems that have been updated. There's a very easy fix for this.
With your phone connected as MTP, navigate to this folder and locate this file
C:\Windows\INF\wpdmtp.inf
Right click on the "wpdmtp.inf" and click install.
Windows will detect your phone...
If I helped you don't forget to say thanks
iAmWiz said:
This is not just a problem for OnePlus 3. It's a general bug for most Windows systems that have been updated. There's a very easy fix for this.
With your phone connected as MTP, navigate to this folder and locate this file
C:\Windows\INF\wpdmtp.inf
Right click on the "wpdmtp.inf" and click install.
Windows will detect your phone...
If I helped you don't forget to say thanks
Click to expand...
Click to collapse
Two things: read the post quoted by you carefully. No detection at all by PC leave alone as MTP. How do you want him to connect as MTP?
Second, read a couple of posts above. The OP's issue is resolved.
What you are talking about is a different issue.
pvramk said:
Hello,
For the past few days, all of a sudden, I am unable to connect my One Plus 3 to any computer. Phone is running OOS 4.0.2, stock recovery, no root.
Tested in two systems running Windows 10, Kubuntu and Windows 7 in which I was able to connect and transfer files to and fro earlier.
The phone is getting charged when connected to computer.
USB debugging is enabled, drivers have been installed and reinstalled. When connected to computer, there is no notification in the notification shade or the status bar that the phone has been connected. so cannot pull down notification shade to change the connection type.
The system also does not recognise the phone and there is no information displayed about phone in the Windows Explorer side menu.
adb devices in normal mode and fastboot devices in bootloader mode do not throw any results at all.
Under Select USB configuration, toggling or cycling through the options (Charging, MTP, PTP etc) has no effect and it stays on Charging all the time.
I have checked with original data cable that came with my phone, with a micro usb cable attached with usb c adapter and also with another original cable borrowed from a colleague.
Any help would be greatly appreciated.
Thanks.
Click to expand...
Click to collapse
tnsmani said:
Two things: read the post quoted by you carefully. No detection at all by PC leave alone as MTP. How do you want him to connect as MTP?
Second, read a couple of posts above. The OP's issue is resolved.
What you are talking about is a different issue.
Click to expand...
Click to collapse
Ohhh sh*t... I read wrong
How do I change the subject line to {CLOSED} ?
Thanks....
pvramk said:
How do I change the subject line to {CLOSED} ?
Thanks....
Click to expand...
Click to collapse
Click the "Report" button and make a request. One of the MODs will take care of it.
tnsmani said:
Click the "Report" button and make a request. One of the MODs will take care of it.
Click to expand...
Click to collapse
I think I might have reported your post ... My mistake. I'm sorry...
Hello everyone!
I'd like to ask you for a little advice here. My Pixel's usb port stopped working. To be more precise, only charging works. So data transfer, adb, fastboot does not work anymore.
I've already read tons of threads on the Internet related to this issue. For some it was only dirty charging port, for some it was needed to change some settings related to usb connection etc. I've tried everything I could find. Firstly I properly cleaned the port + used also contact cleaner and expected it to start working afterwards. That was not the case so I tried to play with the usb settings, reflash custom roms, etc... No success, still only charges. RMA is not possible anymore.
The very strange thing is, that fastboot commands in bootloader mode also stopped working. If this was a software thing I suppose at least fastboot commands in bootloader mode would still work... {I dont have any problems with fastboot installation and drivers on laptop side. Other phones work...}
I've already went for oneplus 7t and the pixel lies in a drawer.
I want to ask, if anyone was able to solve this problem somehow already. I'm asking this, because I think it is a hardware problem and want to try to replace the port:
https://www.ifixit.com/Guide/Google+Pixel+2+XL+Charging+Assembly+Replacement/108463
But I'm not sure, if the problem is in there or it can be motherboard or even something else...
I someone of you have the experience that replacing of the port helped, I would be glad to read about it.
Thank you!
Brano
The port wears out after while from using type c earbuds and sitting on the cord while it's plugged in.
Same thing happened to me. Unless you replace it yourself it's cheaper to buy a used 2xl than fixing the port. At least where I live.
Edmontonchef said:
The port wears out after while from using type c earbuds and sitting on the cord while it's plugged in.
Same thing happened to me. Unless you replace it yourself it's cheaper to buy a used 2xl than fixing the port. At least where I live.
Click to expand...
Click to collapse
Hi,
I've alrady ordered everything needed for the replacement and added also battery to the order.. Once I'm in I will change also that ?
Will report back to this thread the replacement helps
Br4no said:
Hi,
I've alrady ordered everything needed for the replacement and added also battery to the order.. Once I'm in I will change also that ?
Will report back to this thread the replacement helps
Click to expand...
Click to collapse
Did this end up working? I originally thought it was my USB C port failing but I found a ton of people online with issues with pixel 2xl and Android 10. I tested by looking at my USB options and everything is greyed out and the default is no data transfer now. Seems like a bug that Google doesn't seem interested in fixing.
They seem to be making g it harder and harder for me to stay on team pixel.
Br4no said:
Hello everyone!
I'd like to ask you for a little advice here. My Pixel's usb port stopped working. To be more precise, only charging works. So data transfer, adb, fastboot does not work anymore.
I've already read tons of threads on the Internet related to this issue. For some it was only dirty charging port, for some it was needed to change some settings related to usb connection etc. I've tried everything I could find. Firstly I properly cleaned the port + used also contact cleaner and expected it to start working afterwards. That was not the case so I tried to play with the usb settings, reflash custom roms, etc... No success, still only charges. RMA is not possible anymore.
The very strange thing is, that fastboot commands in bootloader mode also stopped working. If this was a software thing I suppose at least fastboot commands in bootloader mode would still work... {I dont have any problems with fastboot installation and drivers on laptop side. Other phones work...}
I've already went for oneplus 7t and the pixel lies in a drawer.
I want to ask, if anyone was able to solve this problem somehow already. I'm asking this, because I think it is a hardware problem and want to try to replace the port:
https://www.ifixit.com/Guide/Google+Pixel+2+XL+Charging+Assembly+Replacement/108463
But I'm not sure, if the problem is in there or it can be motherboard or even something else...
I someone of you have the experience that replacing of the port helped, I would be glad to read about it.
Thank you!
Brano
Click to expand...
Click to collapse
Same problem after may and june month update
hello,my mobile phone also has this problem. after updating the system, i cannot connect to the cpmputer and can only chaarge it, could you solve it ?
wowzors said:
Did this end up working? I originally thought it was my USB C port failing but I found a ton of people online with issues with pixel 2xl and Android 10. I tested by looking at my USB options and everything is greyed out and the default is no data transfer now. Seems like a bug that Google doesn't seem interested in fixing.
They seem to be making g it harder and harder for me to stay on team pixel.
Click to expand...
Click to collapse
Not yet, still waiting for order to be delivered - basically, the usb c port already arrived, just waiting for battery. I will report back, once I'm done.
Regarding the grayed out options - the same here. It can be also result of defective usb c port. If it was a software in my case, then I would expect at least fastboot to work... But it doesnt.. I'm curious what will happen once I replace it.
enson1230 said:
hello,my mobile phone also has this problem. after updating the system, i cannot connect to the cpmputer and can only chaarge it, could you solve it ?
Click to expand...
Click to collapse
I'm still waiting for the battery to be delivered, then I will replace it and let you know, if it was a hardware issue.
Hello everyone,
So, I'm done with the replacement and EVERYTHING WORKS since then. In the picture, there is the old charging assembly.
I have faced this issue whenever Android version updated. 8 to 9 and then 9 to 10, and both times I has to mail it on for service. Second time around though, I was able to chat with the technician and he informed that the issue is because of faulty drivers. SMH. And all they did was reflash the device to OEM state and sent it back.
TL;DR
Moto Z2 Play - XT1710-07
The phone recognizes the SIM card but there is no signal (no service). Tried several things, including flashing a custom ROM. I'm considering buying a new motherboard and changing it myself, but first want to know if anyone knows more about this issue or has an idea/suggestion.
Edit: As an added bonus, something that only now I realized. Now when I charge it, it gets EXTREMELY hot. Like I-can't-even-use-it hot. I used to use the phone while charging all the time, but now I can't even hold it. Seems like the problem is when it tries go past 80% charge. It gets super slow, keeps trying and gets hot. Now I don't know if it's a software problem caused by the various flashings or if it's something that would remain even after swapping the motherboard.
Edit 2: I did a full discharge of the phone and recharged it while turned off. It seems to have normalized the battery problem
Edit 3: RIP. I tried to remove the screen before deciding about buying a new board. In the process, I ended up tearing the digitizer flat cable apart. Now I don't think it's worth it buying both a new screen and a motherboard.
The full story and things I've tried
My phone was working all nice and dandy until it stopped having signal/service. Wifi works normally, but anything related to the SIM card doesn't, like phone calls or mobile data.
A list of things I've tried somewhat in order (both of time and of complexity):
* My SIM in another phone: it works normally, so the problem is not the SIM itself
* Another SIM in my phone: it doesn't work, so the problem is definitely the phone
* Using the second SIM slot
* Changing "Preferred Network Type" between the available ones (4G, 3G, 2G, including Enhanced 4G LTE Mode on and off): this one and the next two items don't really make sense to me, since these options seem to be only related to mobile data (4G/3G internet) connection, not to phone calls which is also not working, but I tried them anyway
* Manually selecting the network: Errors with "Selected network unavailable" and, after trying to register for a while, toasts another error saying "Can't connect to the network, try again later"
* Manually selecting the APN: Tried both selecting between the two options available and manually adding an APN by googling the correct info for my carrier
* Simply booting into fastboot and restarting bootloader: a video on YouTube claimed that it was a temporary solution and that I'd need to do it every time it lost signal. But it didn't even work the first time
* Disabling CQATest and then restarting bootloader (and also clearing its data/cache and removing its permissions): a lot of videos on YouTube claimed this was a solution, including for other Motorola phones. Apparently CQATest prevents the phone from working properly in some scenarios. But I think only when you de-google your phone? Not sure. All I know is that it didn't work either
* Using the phone connected to the wall charger: I think this was another YouTube suggestion, and it actually worked for a few minutes. But I guess it was just a coincidence, as it never worked again
Now for some more... "forceful" attempts:
* Factory Reset: Not sure where I saw this suggestion, but it was pretty much the next logical step. Gathered courage, backed up all my data, etc, aaand... nothing again
* Flashing another ROM: Guess it was here at XDA that I read that it was a problem with Motorola's stock ROM. That, paired with my belief that it could still be related to CQATest being installed, I again gathered more courage to flash a custom ROM. I chose LineageOS and found out that it was no longer supported, but decided to install the last official release. I also read that the problem was the Pie modem firmware, so it all seemed to be going fine since the last official release is Oreo 8.1. I flashed it and BAM it worked! ... for a few minutes and never again. I messed around with LineageOS, tried some of the previous things again, but nothing.
Then, I tried to restore my TWRP backup but it didn't work. So I searched a bit more and downloaded the Stock Pie ROM, flashed it, and closed the bootloader. And then I realized the restore probably didn't work since my backup was made using Pie and my phone was on Oreo. Maybe some files/partitions were missing? Also, when I was creating my TWRP backups, I tried creating a full system image backup but it kept erroring. Only later I realized the problem was that the USB Drive was FAT32 and the full system image was bigger than 4GB. Oh, well, now I know.
So now that I'm with my phone pretty much back on square one, I take it to an authorized repair shop. The clerk said that it was a common problem, and that sometimes it could be solved "by software" and that they'd try that. The other option was to change the whole motherboard, which they didn't do because it was "not worth it" and "almost the full price of a new phone". After two days, my suspicions were confirmed: they didn't fix it with their "by software" attempt. At least I didn't have to pay anything.
When I got the phone back, I put the SIM in again and it showed the icon as if there was signal. But when I tried to call someone, the signal disappeared again. I tried searching a bit more, went through all pages of Q&A here at XDA forums and there were like 3 posts regarding loss of signal. All without any response. On YouTube, I found some videos offering a suspicious .bat file. Upon inspection, it merely erased the modemst1 and modemst2 partitions and then wiped user data and cache. I tried it, nothing to lose. Also didn't work.
Now I'm contemplating a few options:
By watching some disassembly videos, I saw that, when opened, the phone has some parts that act like antennas. I thought that maybe those were not properly connected to the board? Maybe they got dislodged during a fall? Seems unlikely tho, since they are screwed in. I searched for a new motherboard to buy and it's a reasonable price. But I'm afraid it'll have the same problem (or develop it in a short time) since I can't find anywhere what the true cause of the problem is.
Another option is to just give up, buy a new phone and use this one as if it was a "small tablet" lol
So, do you guys have any other suggestions or ideas as to what might be the problem? Maybe a tip like "solder a wire to this spot to create a make-do antenna"? I don't really know where else to search.
If not, thanks anyway for those who read it all