Develop Bugs

Verizon Galaxy Nexus no data or cell service / Possible hardware problem

Recently i have purchased a used Verizon Galaxy Nexus from a seller on ebay. It is in excellent shape and has no cosmetic damage to the phone. The persone i purchased it from was a reputable seller and had the feedback to back it up. Now with that said. The phone was listed as broken because the seller could not get the phone to connect to the Verizon cell network.
So i bought the phone thinking that maybe the phone had some deleted files on it that i could replace or better yet. Just flash all new software to the phone and remedy the problem. Thus i would have bought a phone for a quarter the price of a new one and have a fully functioning phone.
As far as flashing and roming goes. I am no novice. I have owned many Android phones, in fact thats all ive owned lol, but this one is causing me some frustration. So here is a list of the things i have done to remedy the problem to no avail...
1) Factory Reset- no go
2) Complete Re-Flash of the entire framework - Im talking everything. Careful fastboot flash of every elemet of the android ecosystem
3) Radio swapps from older versions to newer versions.
4) Multiple reboots and toggleing airplane mode over and over again.
5) Flashed several aftermarket roms.
6) Toggled the test mode in phone settings using the hidden menu (*#*#4636#*#*)
For a short period of time last night i was able to get the phone to display up to 3 bars of service using the method described in #6 I NEVER got data working and i could only temporarily call out. My girlfriend would see me calling in on her phone but immediately upon answering it would drop my call. The phone never rang on my end and it cannot receive calls. Also cannot send text messages.
I thought for sure i could fix this one, but for some reason it is being stubborn. Please Help me XDA!!! Your my only Hope!!!
P.S. As an aside i did take the phone apart and check to make sure nothing was damaged. All the components look top shape and all the little snap connectors are securely fastened. No metal contact prongs are bent and everything is clean of dirt and debris.

does it display your IMEI *#06#?
maybe some NV_DATA corrupted or it can be hardware issue

Does indeed show imei and I had it checked for lost / stolen / blacklist by Verizon. At the store now to get it checked out.
And that is actually meid that that code pulls.
Sent from my large and in charge GN2 using Forum Runner

And the verizon store could not do any good. Has anyone ever ordered a replacement back casing from ebay or anywhere else on the web? Im thinking it may be a ribbon cable somewhere. Maybe even the bottom board that houses the headphone jack and a series of winding antenna leads.
I am still open to suggestion though so anyone with any information on the matter please let me know.
EDIT: Been looking at Cell phone repair shop and they have the antenna / headphone replacement in stock. They also have the back mid frame with all the antennas on it as well.
I feel like this is a 50/50 shot in the dark as to which part i need to fix this problem. Gonna give them a call tomorrow and see.

I've ordered a new mid frame in the hopes that there is a torn ribbon cable somewhere in the old one. I'm still not certain that's what it is though.
Anyone with some insight please get back to me.
Sent from my Galaxy Nexus using Forum Runner

Bump.
Still need some help guys. This is a very perplexing problem that i would like to fix.

Anyone? Mods? Admins? Devs? I need some help here. Don't let me down xda!!!
Sent from my large and in charge GN2 using Forum Runner

sounds like a unconnected/torn radio cable to me.

Zepius said:
sounds like a unconnected/torn radio cable to me.
Click to expand...
Click to collapse
I've been all through the device and checked all the connections and hardware. Everything has a firm connection and is in top shape. I even replaced the back midframe cover with a brand spanking new (OEM Samsung) one. Its behaving like a software problem in that I can toggle between 3G and 4G and get 3G for a brief moment and can even call out, but the moment that someone answers the call it drops service and i have to start the process all over again.

UrbanDroid said:
I've been all through the device and checked all the connections and hardware. Everything has a firm connection and is in top shape. I even replaced the back midframe cover with a brand spanking new (OEM Samsung) one. Its behaving like a software problem in that I can toggle between 3G and 4G and get 3G for a brief moment and can even call out, but the moment that someone answers the call it drops service and i have to start the process all over again.
Click to expand...
Click to collapse
Try fastboot flashing the factory images from google.
Sent from my Nexus 7 using xda premium

blackhand1001 said:
Try fastboot flashing the factory images from google.
Sent from my Nexus 7 using xda premium
Click to expand...
Click to collapse
I've done this as well several times. 4.2.2 and 4.2.1 and yes i made sure i had the correct firmware for my version of the phone. Verizon toro.
Edit: Has anyone ever sent in their phone to Samsung for RMA? I called and talked to someone and tried to work through the problem and she came to the conclusion that I should send it in at no cost and that I wouldn't be charged anything unless I authorized them payment before. Essentially they will run through the phone and check everything out for free and see if it can be fixed.

UrbanDroid said:
I've done this as well several times. 4.2.2 and 4.2.1 and yes i made sure i had the correct firmware for my version of the phone. Verizon toro.
Edit: Has anyone ever sent in their phone to Samsung for RMA? I called and talked to someone and tried to work through the problem and she came to the conclusion that I should send it in at no cost and that I wouldn't be charged anything unless I authorized them payment before. Essentially they will run through the phone and check everything out for free and see if it can be fixed.
Click to expand...
Click to collapse
I did the same thing. Bought one from ebay in good shape. Was told it functions. I have the HTC Rezound so the sim wouldnt fit. Went to Verizon and they put in the mini sim and no service. Reset the phone and even tried a new sim. I have since tried different roms and radios, but still no service. Luckily the seller has a 100% guarantee so looks like this one is going back. From what I have read, these are prone to radio issues.

Sir Lemmiwinks said:
I did the same thing. Bought one from ebay in good shape. Was told it functions. I have the HTC Rezound so the sim wouldnt fit. Went to Verizon and they put in the mini sim and no service. Reset the phone and even tried a new sim. I have since tried different roms and radios, but still no service. Luckily the seller has a 100% guarantee so looks like this one is going back. From what I have read, these are prone to radio issues.
Click to expand...
Click to collapse
Yeah. I've read multiple threads about radio issues, but here's the thing. Every one of them claiming to have signal issues also had the random reboot issue. They all were even having problems flashing any Roms or anything else for that matter.
I on the other hand have had zero problems flashing anything. Fastboot works 100%, Recovery flash works 100% and I can unlock and lock the boot loader without issue. Its an odd problem.
Sent from my large and in charge GN2 using Forum Runner

UrbanDroid said:
Yeah. I've read multiple threads about radio issues, but here's the thing. Every one of them claiming to have signal issues also had the random reboot issue. They all were even having problems flashing any Roms or anything else for that matter.
I on the other hand have had zero problems flashing anything. Fastboot works 100%, Recovery flash works 100% and I can unlock and lock the boot loader without issue. Its an odd problem.
Sent from my large and in charge GN2 using Forum Runner
Click to expand...
Click to collapse
I've had an issue flashing, it would abort for no reason. I would also have issues getting into CWM. After playing around with it all night, I don't think its a software issue. I've been reading the antenna has given other people issues and some have even tried to replace them. a Rep from Verizon thought it was the sim reader. I don't believe that because the phone registers a sim and the number tied to it (which is my number). Under status, I does read different every time.
Network: searching for service
Signal strength is usually at: -120dBm 99asu
Mobile network type: (varies) CDMA - 1xRTT:7 or LTE: 13 or unavailable
Service state: out of service
Roaming: not roaming
Mobile network state: (varies) Disconnected or Connected
I've tried different combos such as CDMA and Home LTE Automatic and so on. I think its just a poor design. Seems to be only the CDMA devices tho.

Did OP ever arrive at a solution or at least pinpoint the cause of this problem? I am currently experiencing a pretty much identical problem to the one described (with the exception that I don't even get a 3G signal -- complete lack of signal). My problem started after a brief Airplane mode toggle yesterday and I haven't been able to get on the network since.
Thanks.

I think it's a hardware problem tbh.
I modded mine to work with the palm pre touchstone inductive charging kit. In the process wires were soldered, rear housings were mutilated and the phone was tortured a bit. I was never happy with Samsung's **** build quality so I eventually just ditched it altogether.
I decided to repair it and give it to a family member so I replaced the back housing and USB port with parts ordered off ebay. Ever since my repair work the thing cosmetically looks almost mint. However no OS will recognize it anymore (windows throws an "invalid descriptor" and won't install a driver) and 3G/4G/wifi reception is almost nonexistent. Switching roms or radios doesn't seem to help, and obviously I can't odin a factory image. Pretty much boned.

pbourdyk said:
Did OP ever arrive at a solution or at least pinpoint the cause of this problem? I am currently experiencing a pretty much identical problem to the one described (with the exception that I don't even get a 3G signal -- complete lack of signal). My problem started after a brief Airplane mode toggle yesterday and I haven't been able to get on the network since.
Thanks.
Click to expand...
Click to collapse
Had a similar problem in regards to a lack of signal. It just completely gave out while driving a couple days ago (interestingly enough, the music I was streaming via Soundcloud stopped right as I passed the Facebook headquarters in Menlo Park, which ironically is a 4G dead zone for Verizon). This was a refurbished replacement device that I got about 15 months ago, and was running the latest OmniMetal rom flawlessly for the last few months.
I arrived at this thread and followed all the steps that OP took to try and fix it. Ended up reverting to an earlier 4.2.2 rom and reflashed the radios thinking that might solve the problem. Upon reboot was able to connect to mobile data and make phone calls briefly, but about an hour later the same thing happened. Brought it to the store and swapped out the SIM card for a new one, no dice.
Fortunately VZW is doing open enrolment for phone insurance, so I added it for $10/month to get an extended warranty. Now I'm going to restore everything to stock, lock the bootloader and send it back for a new one. Assuming there are no problems with the replacement, I can cancel the insurance plan, bringing the cost of the replacement Gnex to just 10 bucks.
Was anyone out there able to successfully modify the radio hardware for cheap?

coltronathon said:
I think it's a hardware problem tbh.
I modded mine to work with the palm pre touchstone inductive charging kit. In the process wires were soldered, rear housings were mutilated and the phone was tortured a bit. I was never happy with Samsung's **** build quality so I eventually just ditched it altogether.
I decided to repair it and give it to a family member so I replaced the back housing and USB port with parts ordered off ebay. Ever since my repair work the thing cosmetically looks almost mint. However no OS will recognize it anymore (windows throws an "invalid descriptor" and won't install a driver) and 3G/4G/wifi reception is almost nonexistent. Switching roms or radios doesn't seem to help, and obviously I can't odin a factory image. Pretty much boned.
Click to expand...
Click to collapse
I did the same mod, and other than losing my pc connection (which frankly is never needed) it's been great. You have to be very careful and take your time. I'm not even convinced that my pc connection issues are related to the Palm mod, I think they just happened to coincide. Either way, I don't need it so I never bothered tracing it down.

[Q] No IMEI

I just purchased this phone a week ago off of Craigslist, the phone worked great up until today. I noticed that I didn't have any service. I use a microcell at home so it was no big deal, thought that it had messed up like it does every now and again, however I got out to town where I usually have near full signal and still had none. I opened up settings and "Mobile Data" was turned off, I tried to toggle it back on and it will not allow me to do this. I went in to the "About Phone" part of the settings and the phone shows "Unknown" for cell phone number and IMEI.
This is the stock AT&T version G Pro that has not been rooted. I contacted AT&T thinking this may be a sim card problem or maybe I bought a stolen phone, but everything on their end seemed to be clean. I tried out a friends sim card and still had no luck. Called LG and they said I would need to send it in with a receipt. I don't have a receipt and I won't pay for them to repair the phone, because I'm sure the bill will wind up being more than the phone is worth.
Has anyone else had this problem? Are their any fixes anyone can think of that doesn't involve rooting the device? If not, what steps will I need to take to recover my IMEI so that the phone will actually make/receive phone calls and texts?

charlee08 said:
I just purchased this phone a week ago off of Craigslist, the phone worked great up until today. I noticed that I didn't have any service. I use a microcell at home so it was no big deal, thought that it had messed up like it does every now and again, however I got out to town where I usually have near full signal and still had none. I opened up settings and "Mobile Data" was turned off, I tried to toggle it back on and it will not allow me to do this. I went in to the "About Phone" part of the settings and the phone shows "Unknown" for cell phone number and IMEI.
This is the stock AT&T version G Pro that has not been rooted. I contacted AT&T thinking this may be a sim card problem or maybe I bought a stolen phone, but everything on their end seemed to be clean. I tried out a friends sim card and still had no luck. Called LG and they said I would need to send it in with a receipt. I don't have a receipt and I won't pay for them to repair the phone, because I'm sure the bill will wind up being more than the phone is worth.
Has anyone else had this problem? Are their any fixes anyone can think of that doesn't involve rooting the device? If not, what steps will I need to take to recover my IMEI so that the phone will actually make/receive phone calls and texts?
Click to expand...
Click to collapse
Are YOU SURE you did not do anything to the phone? Cause loosing an IMEI requires the USER to do something wrong, like flashing other carrier Versions.

hyelton said:
Are YOU SURE you did not do anything to the phone? Cause loosing an IMEI requires the USER to do something wrong, like flashing other carrier Versions.
Click to expand...
Click to collapse
I've had my phone do that before. Wasn't rooted or hacked in any way. I didn't even know of a way to do it. What fixed mine was a **** load of factory resets. And I mean a **** LOAD!!! Luckily it came back and I've been good ever since. Don't know what happened or how but that was very weird.
Note to the wise: I don't care who says what about what! NEVER buy a phone off of craigslist or from anyone for that matter other than a carrier or authorized reseller. Because when it breaks, you can't do **** about it!

hyelton said:
Are YOU SURE you did not do anything to the phone? Cause loosing an IMEI requires the USER to do something wrong, like flashing other carrier Versions.
Click to expand...
Click to collapse
Well I have no reason to lie about something like this. I've only rooted one phone of the dozen or so I've owned and that was a old Galaxy Note.
This morning when I got home from work the phone had 76% battery left, woke up and it was dead. It powered up and showed 2% battery. I went into battery under settings, android system used 26% of the battery. Not sure that's enough to drain the batter while I was asleep.
Must be something definitely wrong in the phone.
Jammol said:
I've had my phone do that before. Wasn't rooted or hacked in any way. I didn't even know of a way to do it. What fixed mine was a **** load of factory resets. And I mean a **** LOAD!!! Luckily it came back and I've been good ever since. Don't know what happened or how but that was very weird.
Note to the wise: I don't care who says what about what! NEVER buy a phone off of craigslist or from anyone for that matter other than a carrier or authorized reseller. Because when it breaks, you can't do **** about it!
Click to expand...
Click to collapse
Yeah, lesson learned. Craigslist is usually where I do my cell phone trading and buying.
I'll keep trying resets to see if this fixes the problem. Thanks!

Try to re flash a stock using an LG flash tool it might work as what other users did on their G Pro have the same issues

Still haven't found anything that works.
I'm guessing something has malfunctioned in the phone.

[Q] No Service.. anywhere.

So my wifes phone no longer likes to be bothered with phone calls or text messages. Her phone has been running flawlessly since we got it and about a month ago she dropped it and cracked the screen. It was too the point where the touch screen wouldn't respond to anything and we had to have it fixed. She took it to one of those places in the mall and they said they could have it back to us in a week or so. Once she got it back, she has had constant issues with not being able to connect to the Sprint Network (only for phone calls, data and wifi still work fine). She often roams but still with very little signal strength. She tried a factory reset, as per the Sprint Customer Service suggestion, and it did nothing. She had remained Unrooted up until this point and I finally convinced her to come to the dark side. I did the root, installed TWRP, and flashed her with Optimus DE. I got no change. I reflashed her Radio. Still nothing. I am at Wits end on this one and ask for some guidance. It would be much appreciated
(ps. She doesn't have insurance on her phone.)

iam87x said:
So my wifes phone no longer likes to be bothered with phone calls or text messages. Her phone has been running flawlessly since we got it and about a month ago she dropped it and cracked the screen. It was too the point where the touch screen wouldn't respond to anything and we had to have it fixed. She took it to one of those places in the mall and they said they could have it back to us in a week or so. Once she got it back, she has had constant issues with not being able to connect to the Sprint Network (only for phone calls, data and wifi still work fine). She often roams but still with very little signal strength. She tried a factory reset, as per the Sprint Customer Service suggestion, and it did nothing. She had remained Unrooted up until this point and I finally convinced her to come to the dark side. I did the root, installed TWRP, and flashed her with Optimus DE. I got no change. I reflashed her Radio. Still nothing. I am at Wits end on this one and ask for some guidance. It would be much appreciated
(ps. She doesn't have insurance on her phone.)
Click to expand...
Click to collapse
It sounds like the antenna may not have been reconnected upon completion of the screen replacement. At this point though I would attempt a PRL and profile update for the phone. If that still doesn't work I would take it back to the repair shop and request they check the antenna since it was working before the repair.

This ^^^^ And also, Optimus DE can have weaker signal. Try a Stock ish ROM. You can also try going to Settings>About>More>Mobile Networks and check CDMA. It can help too.
Sent from my LG-LS970 using XDA Premium 4 mobile app

Thanks for the suggestions, I will let her know about the antenna issue, that sounds like it possibly could be the case. I tried Stocktimus as well as Optimus DE, I just forgot to mention it. I chose the most basic (closest to Stock option) it had.
Also, I tried the PRL and Profile update and it had no change in signal.
Thanks for the replies.

Cellular radio problem

My note 2 shows no bars with a good sim card installed.
and has no service what soevevr.I was thinking its the
radio.but when I remove sim it shows signal and can make an emergency call.
Im stumped.I even Odonda back to stock no help.
any ideas before I start replacing hardware.
iv tried other sim out friends phone and using my sim in backup phone.
Warranty is expired.any help please

Maybe apn needs to be set up??? [emoji782]
Not sure what happen to your phone but from your explanation points to your apn!!
Sent from my T889 using Forum Runner

Bajanman said:
Maybe apn needs to be set up??? [emoji782]
Not sure what happen to your phone but from your explanation points to your apn!!
Sent from my T889 using Forum Runner
Click to expand...
Click to collapse
Ya I checked that its same as my buddy note 2to same carrier. AT&T

Weird! I've been having the same issue lately.
In my case, cellular reception became spotty (completely losing connectivity in areas where I'd never previously had issues in my two years with this phone), and then cut out permanently after I dropped the phone fairly hard. I replaced the antenna (not an easy part to acquire, as I went through three ebay auctions before someone finally sold me the correct part) and it was spotty again for about a week before completely dying out again. I started using a backup phone out of frustration before finding another fully functional SGH-i317 for sale on the cheap, and I ended up combining the parts from the two to make a working phone. One day in, and the only issue is that the phone fails to regain cellular connectivity after leaving a dead zone (a few resets have so far done the trick)
Anyway, I'm far from an expert on this, but just to get the conversation going, here are some things I noticed:
Both my original Note II as well as the used one I purchased are 16 Gb SGH-i317 (AT&T GSM) models stamped N7105 under the Samsung sticker in the battery bay. Both used the OEM blue antenna wire (some Note II variants apparently use white wires of the same length), and the smaller boards at the bottoms of the phones which the antenna plugs into (with the charger port attached) are stamped SGH-i317 rev0.7 R.C94(KH) 25. The only difference I've noticed is that the new model is stamped "LTE #1" on the bezel underneath the motherboard whereas my old one was stamped with a different number (which of course I can't remember now that I've reassembled it)
Not sure if any of these weird little specifics will help anyone else who is having the issue, but I figured I'd put it out there just in case.
For the record, I'm in the same boat as OP after having reset/restored a few times. I also hadn't installed anything new/ominous or modified anything prior to the issue occurring originally.

Thank you.I also read in another thread that the modem drier may be corrupted. So the phone can not communicate width modem.

rexamillion59 said:
Thank you.I also read in another thread that the modem drier may be corrupted. So the phone can not communicate width modem.
Click to expand...
Click to collapse
One other thing if there's a place you can take it to and have them check the sim tray?? Might be a possible fix??
Sent from my T889 using Forum Runner

I would flash the current AT&T modem, then use a few APN'S until you find the best for your area.

Iv been trying the different modems and apns.no luck so far.
Im going to do as Benjamin said and have sim slot checked.
Although it seem it is working because.it shows son when installed.
And nothing when out

You don't mention flashing any custom roms or updates, but assuming you have, the best way to troubleshoot your phone would be to return your phone all the way back to stock. This strategy has cured baseband, gps, headphone issues etc.

Lost Cell Signal after replacing charging port connector.
I have a SGH-i317 NOTE 2 and am experiencing the same issue after replacing the charging port connector.
does anyone know if the charging port connector is related to cell phone signal strength? After replacing this part, i cannot even get a signal indoors and only a weak signal outdoors.
careet said:
Weird! I've been having the same issue lately.
In my case, cellular reception became spotty (completely losing connectivity in areas where I'd never previously had issues in my two years with this phone), and then cut out permanently after I dropped the phone fairly hard. I replaced the antenna (not an easy part to acquire, as I went through three ebay auctions before someone finally sold me the correct part) and it was spotty again for about a week before completely dying out again. I started using a backup phone out of frustration before finding another fully functional SGH-i317 for sale on the cheap, and I ended up combining the parts from the two to make a working phone. One day in, and the only issue is that the phone fails to regain cellular connectivity after leaving a dead zone (a few resets have so far done the trick)
Anyway, I'm far from an expert on this, but just to get the conversation going, here are some things I noticed:
Both my original Note II as well as the used one I purchased are 16 Gb SGH-i317 (AT&T GSM) models stamped N7105 under the Samsung sticker in the battery bay. Both used the OEM blue antenna wire (some Note II variants apparently use white wires of the same length), and the smaller boards at the bottoms of the phones which the antenna plugs into (with the charger port attached) are stamped SGH-i317 rev0.7 R.C94(KH) 25. The only difference I've noticed is that the new model is stamped "LTE #1" on the bezel underneath the motherboard whereas my old one was stamped with a different number (which of course I can't remember now that I've reassembled it)
Not sure if any of these weird little specifics will help anyone else who is having the issue, but I figured I'd put it out there just in case.
For the record, I'm in the same boat as OP after having reset/restored a few times. I also hadn't installed anything new/ominous or modified anything prior to the issue occurring originally.
Click to expand...
Click to collapse

S9 won't Connect to Network After Screen Replacement

I recently had the screen replaced on my S9. Since the replacement, it won't connect to the phone network (O2, UK). It shows that it is picking up a signal, but will not register on the network at all. When I try to register it, the signal strength display immediately drops to zero and I get the message "unable to connect, please try again later". The SIM card that I am using works fine in an old S7.
I have tried:
Dropping to 2G/3G only mode.
Network setting reset.
Deleting and recreating the APN.
Booting to safe mode.
A soft reset.
A factory reset.
Booting to recovery menu and wiping the cache.
All to no avail.
I took the phone back to the man that repaired it, he was able to get his SIM working in the device (after some time spent fiddling with settings), but couldn't get mine to work. He is disclaiming responsibility for the issue as a result of him being able to get it to work.
Is it just that the repairer has damaged the antenna? Or is it something to do with the replacement kit he's installed being incompatible? I've been trying to find out a way to test the antenna functionality, but am not really understanding what I'm seeing. I've added some images of diagnostic screens in case they are helpful. One thing that stands out is that the values for AP/BL/CP/CSC do not match - should they? I have tried to look into the CSC settings, but #*272[IMEI]# isn't enabled.
I'm a database developer by trade, so reasonably technically competent. But just have zero knowledge in this area. I'm a bit stumped as to what to try next. Any suggestions gratefully received.
Edit: Cant add links as I'm a noob. Settings are:
BL: G960FXXS9DTD7
AP: G960FXXS9DTD7
CP: G960FXXS9DTD7
CSC: G960FOXM9DTD7

I'm not sure it will work or not, maybe you can try to flash the phone firmware from this

B1nz said:
I'm not sure it will work or not, maybe you can try to flash the phone firmware from
Click to expand...
Click to collapse
Hi B1nz,
Thanks for the reply and apologies for my slow response. I'm reluctant to attempt this atm, as I don't want to risk buggering the phone and therefore giving the guy that repaired it an excuse to brush me off. If I could find a way to test the antenna functionality, that would be a big help. Are you aware of anything I can do to check that the antenna is / is not functional?
Thanks, Iain

eye_seven_four said:
Hi B1nz,
Thanks for the reply and apologies for my slow response. I'm reluctant to attempt this atm, as I don't want to risk buggering the phone and therefore giving the guy that repaired it an excuse to brush me off. If I could find a way to test the antenna functionality, that would be a big help. Are you aware of anything I can do to check that the antenna is / is not functional?
Thanks, Iain
Click to expand...
Click to collapse
You can just simply go to Settings -> About Phone -> SIM Status, or you can follow this article

B1nz said:
You can just simply go to Settings -> About Phone -> SIM Status, or you can follow
Click to expand...
Click to collapse
Having swapped the sim in, I get a brief flicker where it recognises that it's on the O2 network, with a signal strength of -87 dBm 33 asu. It the immediately loses the network and the signal strength changes to -113 dBm 0 asu.
Swapping the sim to my S7, I get a signal strength of -87 dBm 54 asu.
It's odd that I get that initial flicker of good signal then nothing. Is this an indication that the antenna isn't working properly? Something else?
Thanks for your help so far, I appreciate it.

eye_seven_four said:
Having swapped the sim in, I get a brief flicker where it recognises that it's on the O2 network, with a signal strength of -87 dBm 33 asu. It the immediately loses the network and the signal strength changes to -113 dBm 0 asu.
Swapping the sim to my S7, I get a signal strength of -87 dBm 54 asu.
It's odd that I get that initial flicker of good signal then nothing. Is this an indication that the antenna isn't working properly? Something else?
Thanks for your help so far, I appreciate it.
Click to expand...
Click to collapse
Not sure this is related. I personally changed my battery on my S9 last week. Was all prepared. Had all the tools. Still required heat gun etc to get rear glass off. Replaced battery. After a few days noticed I was only using wifi and not cellular data. My IMEI was there fine. But no data. Tried every trick in the book. Even odin Installed straight stock DT7. Everything worked but data. Then also to my horror, back to prenormal in download mode. I think battery removal reset all the rmm stuff. Followed the online stiff on how to change the date and turn off the windows time settings to auto update etc. Anyways, got back my OEM unlock tab too following the guides to fix RMM. Bottom line, I think the heat destroyed Internal antenna module. Ordered one online for 9 dollars. Should have it in two weeks....had to order it from the UK...lol. I am sure this is the issue since with Tmobile wifi calling, I never knew I had an issue till I noticed turning off my wifi killed all data. No APN issues, no sim issues, IMEI shows just fine. It's the antenna module. I see one bar for a second then a circle with a diagonal line. I'm 99% sure you have same issue.

Docmjldds said:
Not sure this is related. I personally changed my battery on my S9 last week. Was all prepared. Had all the tools. Still required heat gun etc to get rear glass off. Replaced battery. After a few days noticed I was only using wifi and not cellular data. My IMEI was there fine. But no data. Tried every trick in the book. Even odin Installed straight stock DT7. Everything worked but data. Then also to my horror, back to prenormal in download mode. I think battery removal reset all the rmm stuff. Followed the online stiff on how to change the date and turn off the windows time settings to auto update etc. Anyways, got back my OEM unlock tab too following the guides to fix RMM. Bottom line, I think the heat destroyed Internal antenna module. Ordered one online for 9 dollars. Should have it in two weeks....had to order it from the UK...lol. I am sure this is the issue since with Tmobile wifi calling, I never knew I had an issue till I noticed turning off my wifi killed all data. No APN issues, no sim issues, IMEI shows just fine. It's the antenna module. I see one bar for a second then a circle with a diagonal line. I'm 99% sure you have same issue.
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That looks *very* similar, doesn't it? My initial suspicion was a damaged antenna module. But how would that explain it briefly picking up signal for me, or it picking up a signal for the repair guy that was adequate enough to make calls?

eye_seven_four said:
That looks *very* similar, doesn't it? My initial suspicion was a damaged antenna module. But how would that explain it briefly picking up signal for me, or it picking up a signal for the repair guy that was adequate enough to make calls?
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Briefly can be intermittent, broke weird....don't know. All I can say is I am 99.999999% of the belief the process can affect the internal antenna. My phone worked perfect until two days of use I noticed the issue. Will know when replacement part comes and I install. I left my battery glass cover off, so I can easily get to putting it in fairly easily. And I know all the formatting and reinstalling etc is a waste of time. Been there. Done that. Even have an alternate sim card here for another Tmobile account number I use. Sim cards work no issues on my Note 8 I am using now till I get the part. And again, all my IMEI stuff was there and APN's there. And I could make wifi calls on TMobile network no issues. Gotta be hardware, IMHO.

Docmjldds said:
Briefly can be intermittent, broke weird....don't know. All I can say is I am 99.999999% of the belief the process can affect the internal antenna. My phone worked perfect until two days of use I noticed the issue. Will know when replacement part comes and I install. I left my battery glass cover off, so I can easily get to putting it in fairly easily. And I know all the formatting and reinstalling etc is a waste of time. Been there. Done that. Even have an alternate sim card here for another Tmobile account number I use. Sim cards work no issues on my Note 8 I am using now till I get the part. And again, all my IMEI stuff was there and APN's there. And I could make wifi calls on TMobile network no issues. Gotta be hardware, IMHO.
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So I've spoken to the guy that did the repair, he's going to change the antenna module. Let's see what transpires... I'll update when it's done.

eye_seven_four said:
So I've spoken to the guy that did the repair, he's going to change the antenna module. Let's see what transpires... I'll update when it's done.
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Thanks....

Docmjldds said:
Thanks....
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I fixed MY issue. When replacing the battery, there's a blue wire that I inadvertently slightly pulled the end connector off the circuit board. It looked like it was connected, but it wasn't pushed all the way into it's connector. We are talking a connector that is approx 1mm or less in diameter. I just didn't see it was not properly pushed in. Connected it using a magnifier glass (I have old eyes). BEAUTIFUL cellular 4g/LTE signal. Just gotta clean it all up, and put back my rear glass. Bought a replacement glass setup with all the adhesives attached to come as close to waterproof as original.

Ok. So the antenna module has been replaced, using a part that I personally purchased. I was given the old part by the repairer, so I'm comfortable that he actually did it. This hasn't fixed the problem. Whilst I was there, he took out the sim from his own phone and put it into mine. Bam! Instantly picked up his network with a full strength 4g signal.
On getting home, I tried again with my wife's sim. It didn't work on LTE, but when dropped into 2G/3G only mode, it did look like it had a signal. But, I could not connect a call out in this mode.
I'm at a loss to understand what is going on here. Any ideas?
Edit: wife's sim is EE

Hi i just recently had this same issue after i took my s9 plus in for a screen replacement the technician used a donor phone for the screen and midframe,he basically just took the motherboard from my phone and put it into the other from there no network turns out if you dont take the origional daughter board aswell it will cause a mipi failure thus phone can't register on network,got my original daughter board back issue solved