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Hi everybody,
I'm totally new in this flashing world and I was messing around with my new Xperia Z1 Compact trying to get Kit Kat installed because when I bought the phone it came with JB 4.3. I flashed Latest KitKat Nordic 14.3.A.0.757 unbranded, and everything worked like a charm until I discovered that I lost 4G connection (It only connects to 3G). I went to settings to select network, and LTE is checked.
I was reading about this matter and it seems that nordic ROM doesn't support LTE Band 7 (2600Mhz) which is the band in my carrier. I tried flashing Central Europe Rom and Global rom for journalists found here in the forums. None of them seems to support my LTE band. I want to know if there is any way to recover 4G changing any setting or if you know a link to any generic ROM compatible with LTE Band 7 (2600Mhz), or if there is any way to revert to my original Jellybean 4.3 ROM using PC Companion or Sony Update Service. Any help will be very apreciated.
Hello,
I am using the Generic UK .757 on a BAND4 LTE network in Canada.
you have checked off the first thing to do from the checklist..
second is to make sure your APN settings are correct.
All these are simple, but if still no luck, some labour is in order.
Need to do full wipe and clean re-install
IF you are not rooted, just launch Sony PC companion with the phone NOT CONNECTED and do a repair. It should by default take you to KK
At the time of flashing, You probably had the wrong boxes checked and unchecked in the WIPE and Exclude boxes..
I'll try the two options
Thanks guys for the responses.
First I'll try to flask UK ROM to see if finally I get kitkat working on my phone. If this doesn't work I'll take the second option with PC Companion to restore the original ROM. I'll post the results.
It seems this rom doesn't work for me
GuizmoPhil said:
Hello,
I am using the Generic UK .757 on a BAND4 LTE network in Canada.
Click to expand...
Click to collapse
Hi Phil,
I found UK rom in this forum ver. .681 and flashed it, then I downloaded OTA update to .757. So far the problem remains. I discovered that I was wrong about My LTE Band, is 7 not 4. Apparently there's a carrier in UK with band [email protected] same as here (Colombia), so theorically this rom should work, but this is not the case. I'm trying to change more settings without luck. If you know something to help me, it would be very appreciated. Thanks.
Y2j-Hotaru said:
Hi Phil,
I found UK rom in this forum ver. .681 and flashed it, then I downloaded OTA update to .757. So far the problem remains. I discovered that I was wrong about My LTE Band, is 7 not 4. Apparently there's a carrier in UK with band [email protected] same as here (Colombia), so theorically this rom should work, but this is not the case. I'm trying to change more settings without luck. If you know something to help me, it would be very appreciated. Thanks.
Click to expand...
Click to collapse
Try changing it from the ussd *#*#4636#*#*
Sent from my C6902 using XDA Free mobile app
not able to download original rom
jewelkobayashi said:
you have checked off the first thing to do from the checklist..
second is to make sure your APN settings are correct.
All these are simple, but if still no luck, some labour is in order.
Need to do full wipe and clean re-install
IF you are not rooted, just launch Sony PC companion with the phone NOT CONNECTED and do a repair. It should by default take you to KK
At the time of flashing, You probably had the wrong boxes checked and unchecked in the WIPE and Exclude boxes..
Click to expand...
Click to collapse
Hi jewelkobayashi,
I tried the method you wrote, but, despite the phone being disconnected, it downloaded the same ROM that I recently have flashed (GLOBAL .757 commercial and Journalist). Is there any other way to download the original Phone ROM . I know my original ROM is GLOBAL-14.2.A.1.114 and the customization number is 1281-3723. I haven't found any site to download this exact firmware. If you know something, it would be very appreciated. Thanks in advance.
Are you sure about your customization number? Because it gets changed if you flash another firmware. Here's everything you need to know: http://forum.xda-developers.com/showthread.php?p=52011642 to download your firmware. By the way, what's your country, branding and SI-Number (so I can add your customization number to the list)?
Y2j-Hotaru said:
Hi everybody,
I'm totally new in this flashing world and I was messing around with my new Xperia Z1 Compact trying to get Kit Kat installed because when I bought the phone it came with JB 4.3. I flashed Latest KitKat Nordic 14.3.A.0.757 unbranded, and everything worked like a charm until I discovered that I lost 4G connection (It only connects to 3G). I went to settings to select network, and LTE is checked.
I was reading about this matter and it seems that nordic ROM doesn't support LTE Band 7 (2600Mhz) which is the band in my carrier. I tried flashing Central Europe Rom and Global rom for journalists found here in the forums. None of them seems to support my LTE band. I want to know if there is any way to recover 4G changing any setting or if you know a link to any generic ROM compatible with LTE Band 7 (2600Mhz), or if there is any way to revert to my original Jellybean 4.3 ROM using PC Companion or Sony Update Service. Any help will be very apreciated.
Click to expand...
Click to collapse
Stop flashing random ROMs and check your settings! Unless you have a different model phone than the rest of us (there are three, D5503, M51w and SO-02F), then ANY Z1C (D5503) ROM will work, but they come with different APN lists as bundling every carrier in the worlds APN settings would be a waste of space. Go to Settings > Mobile Networks > Access Point Names, and edit or create the correct APN in there. Look at a friends phone or on your carriers website for the correct settings. This is your problem, no doubt about it.
Please note that some carriers (mine included) have a special APN for LTE. E.g. standard is internet.tele2.se, LTE is 4g.tele2.se on my carrier.
...I have no idea where you're getting your data from, because literally every LTE network in the Nordics uses band 7.
Finally it worked
Rekoil said:
Stop flashing random ROMs and check your settings! Unless you have a different model phone than the rest of us (there are three, D5503, M51w and SO-02F), then ANY Z1C (D5503) ROM will work, but they come with different APN lists as bundling every carrier in the worlds APN settings would be a waste of space. Go to Settings > Mobile Networks > Access Point Names, and edit or create the correct APN in there. Look at a friends phone or on your carriers website for the correct settings. This is your problem, no doubt about it.
Please note that some carriers (mine included) have a special APN for LTE. E.g. standard is internet.tele2.se, LTE is 4g.tele2.se on my carrier.
...I have no idea where you're getting your data from, because literally every LTE network in the Nordics uses band 7.
Click to expand...
Click to collapse
Thanks for your response. I verified APN settings with friend's phones and it was identical. Finally I called my carrier's help desk and after some try/error setups with them, they gave me an alternate APN that worked until I came home where 4G icon dissapeared again. Then, I was surprised with helpdesk response when I called them again. "There is no 4G coverage in your home area". O.O What is intriging to me is that the phone displayed 4G all the time when I just bought it (Even with restarts and wherever i was) and this changed only when I flashed a generic rom. Is just a silly assumption, but, is possible that carriers can make things like force 4G icon in their custom roms to make advertising or something like that? Just asking. Anyway, Thanks a lot for the responses.
crohit911 said:
Try changing it from the ussd *#*#4636#*#*
Sent from my C6902 using XDA Free mobile app
Click to expand...
Click to collapse
Emmm do you have a manual to how to use the ussd??
I went into it to check it out, I touched I don't know what...
And now I can no longer connect to my network provider...
(reboot doens't helps, changing to wdmca or gsm or other options doesn't changes, VPN seems ok, I have no signal... )
Help!!!
Ok, this is what I did to screw it all
Go to the ussd *#*#4643#*#*
Go to phone info
Go to setings and Select radio band
It gives me the option of GSM/UMTS band = USA Band
-> I no longer have WCDMA or GSM connection :S
(LTE still works...)
Now, how do I go back to my previous options? or does it has nothing to do with it, and the problem is something else?
EDIT> problem solved, I had to reflash my ftf by just updating the FOTA (not sure I needed this...) and the BASEBAND... Now I am back up and running again.. >D
emilic said:
Ok, this is what I did to screw it all
Go to the ussd *#*#4643#*#*
Go to phone info
Go to setings and Select radio band
It gives me the option of GSM/UMTS band = USA Band
-> I no longer have WCDMA or GSM connection :S
(LTE still works...)
Now, how do I go back to my previous options? or does it has nothing to do with it, and the problem is something else?
EDIT> problem solved, I had to reflash my ftf by just updating the FOTA (not sure I needed this...) and the BASEBAND... Now I am back up and running again.. >D
Click to expand...
Click to collapse
Good to know that your problem is solved, even better you solved it yourself. Sorry for not being able to help, I don't know about that ussd code I shall try.
Sent from my C6902 using XDA Free mobile app
crohit911 said:
Good to know that your problem is solved, even better you solved it yourself. Sorry for not being able to help, I don't know about that ussd code I shall try.
Sent from my C6902 using XDA Free mobile app
Click to expand...
Click to collapse
Actually, there's an app in Google Play that is a shortcut to this ussd code : 4G LTE SWITCH
For anybody that has bought the US Retail version of the Moto G5 Plus (XT1687) and noticed that using it on Freedom Mobile in Canada results in the phone getting stuck on 3G after a call, there is a fix.
Note: This fix is specific to Freedom Mobile, it will break VoLTE for other providers. Likewise, it will break OTA updates.
Prerequisites
Stock firmware NPNS25.137.35-5 (may work with others)
Unlocked bootloader (UPDATE: Does not seem to require this as confirmed below)
Installation
Ensure you are on stock firmware, with unlocked bootloader
Boot into bootloader (hold vol up + vol down + power when phone is off)
Download the attached fsg.mbn unzip it and flash it in the bootloader (fastboot flash fsg fsg.mbn) and erase modem config (fastboot erase modemst1 and fastboot erase modemst2), boot into the OS
Once phone boots, wait a bit of time for the signal to come back
Make a call, it will go down to 3G. Once you finish the call, it will go back to LTE.
Uninstall
Download the stock firmware and flash it. Alternative, you can do "fastboot flash fsg fsg.bin" and modem config erase (fastboot erase modemst1 and fastboot erase modemst2) part only to keep your data.
Proof
Doesn't apply to me, but glad to see it fixed! Out of curiosity, what in the modem file broke this?
It was just missing configuration. I posted this on the OP5 forum for their engineers:
You need to update the EFS image so the following settings are present for PLMN 302 490:
in /nv/item_files/wcdma/rrc/
rrc_b66_plmn_support to contain "0x03 0x00 0x02 0x03 0x04 0x09 0x00" (i.e 302 490)
wcdma_rrc_fast_return_to_lte_after_csfb to contain "0x01" i.e true
wcdma_rrc_fast_return_to_lte_after_csfb_timer to have a valid timer setting
You'll need to add a new .mbn file to NON-HLOS.bin:/image/modem_pr/mcfg/configs/mcfg_sw/generic/.... to apply the above settings when the right ICCID (starting with 89149000) or PLMN (302 490) is detected. This would be the "FSG" partition on Moto phones.
zivan56 said:
It was just missing configuration. I posted this on the OP5 forum for their engineers:
You need to update the EFS image so the following settings are present for PLMN 302 490:
in /nv/item_files/wcdma/rrc/
rrc_b66_plmn_support to contain "0x03 0x00 0x02 0x03 0x04 0x09 0x00" (i.e 302 490)
wcdma_rrc_fast_return_to_lte_after_csfb to contain "0x01" i.e true
wcdma_rrc_fast_return_to_lte_after_csfb_timer to have a valid timer setting
You'll need to add a new .mbn file to NON-HLOS.bin:/image/modem_pr/mcfg/configs/mcfg_sw/generic/.... to apply the above settings when the right ICCID (starting with 89149000) or PLMN (302 490) is detected. This would be the "FSG" partition on Moto phones.
Click to expand...
Click to collapse
Would you be able to advise in more details how you would usually modify modem firmware with new config settings or point me in the right direction?
The file provided does help recover back to LTE after a voice call, but not if phone dropped to 3g due to poor reception.
Thank you
You would need to use QXDM/EFS Explorer to modify the various NV items relating to that.
The file is not meant to make the phone hold on to weak signal (or touch any such parameters), it simply allows it to switch back to LTE from 3G.
Thanks zivan. This is amazing find and fix. Unfortunately for me for some reason phone does not return back to LTE even in strong signal areas. It only returns to LTE after a call.
Not sure why.
Hmm, that's quite strange, I'm not experiencing that issue myself.
I only have 3G coverage at work, but as soon as I go outside it goes back to LTE automatically.
Damn.
Thanks for the help though. I flashed your file with fastboot commands and erased modemst1/2.
I don't have bootloader unlocked, not sure if this makes any difference, stock 137-35-5.
Thanks.
Hmm, if it fixed going back to LTE after a voice call, then it means it did apply despite a locked bootloader.
I am not sure why it would accept this image, as its unsigned...I guess Motorola doesn't check this partition for valid signatures.
Perhaps you have an app in the background that is constantly using data? Most phones will not go back to LTE from 3G unless all apps stop using data.
I think it is working as expected now.. not sure why.
So, as I said. It would never return to LTE even in strong signal areas. I played a little with the *#*#2436#*#* menu. I switched from LTE/UMTS auto PRL to LTE/TD-UCDMA/UMTS. I know TD-UCDMA (or whatever is in the menu) will not work with freedom mobile, but I was looking for an LTE/UMTS option without auto PRL.
So I switched to that, rebooted, (the phone still returned back to LTE/UMTS auto after reboot) and now it does recover to LTE. Sometimes it takes a minute or two, but it does recover. So I am very happy.
This is great fix, and it does work. Thank you for your work. I really hope once new OTA update comes out, you will implement the fix for the new version
thank you!
Good to hear it is working now
I agree the phone is a bit "lazy" in terms of going back to LTE sometimes...I am not sure if this is a phone issue or the network setting the threshhold.
Thanks for confirming it works with a locked bootloader, I have updated the main post to reflect this.
I am hoping the next OTA makes this patch unnecessary, but I do plan to patch the next version if it comes to that.
What would the process be for making this work with an unlocked Moto G5S Plus (assuming they have the issue)?
It would need the same NV items modified as any other Qualcomm device.
zivan56 said:
It would need the same NV items modified as any other Qualcomm device.
Click to expand...
Click to collapse
And that would probably require an unlocked bootloader, right?
sensi277 said:
And that would probably require an unlocked bootloader, right?
Click to expand...
Click to collapse
If it is similar to most other non-Verizon Moto phones, then no. Only the configuration is signed and not the FSG partition itself.
zivan56 said:
If it is similar to most other non-Verizon Moto phones, then no. Only the configuration is signed and not the FSG partition itself.
Click to expand...
Click to collapse
Cool. Okay, one more question - can someone confirm that there are issues with the phone switching back to LTE after dropping to 3G due to a weak signal? Does it do it eventually, or do you need to force it?
Edit: Oh, and one more thing - when the Oreo update comes out, I'll have to flash the OTA from my computer, right? How would I go about doing that when the time comes?
Sorry for all the questions, I'm very seriously considering the G5+ or G5S+ for use on the Freedom network and it's been a while since I've had a Moto G device.
sensi277 said:
Cool. Okay, one more question - can someone confirm that there are issues with the phone switching back to LTE after dropping to 3G due to a weak signal? Does it do it eventually, or do you need to force it?
Edit: Oh, and one more thing - when the Oreo update comes out, I'll have to flash the OTA from my computer, right? How would I go about doing that when the time comes?
Sorry for all the questions, I'm very seriously considering the G5+ or G5S+ for use on the Freedom network and it's been a while since I've had a Moto G device.
Click to expand...
Click to collapse
There are a few reasons. One is how the network is configured, its not made to hold onto LTE like Big 3, this is purely a config on the network side.
The Qualcomm issue is only after calls or for any other reason for being dropped down to 3G.
I've posted a guide for the Moto E4 here. You can give it a try, it should work on any Moto Qualcomm based phone. However, some phones overwrite these settings upon reboot, so it may not stick. YMMV.
Hey zivan. So I did ota update for the latest August security patch. Was no problem phone works fine. Did not have a chance to test if "Freedom mobile fix" is still in place, since my house is in 3g area. will test tomorrow. Wonder if you had a chance to see if LTE still works.
zivan56 said:
There are a few reasons. One is how the network is configured, its not made to hold onto LTE like Big 3, this is purely a config on the network side.
The Qualcomm issue is only after calls or for any other reason for being dropped down to 3G.
I've posted a guide for the Moto E4 here. You can give it a try, it should work on any Moto Qualcomm based phone. However, some phones overwrite these settings upon reboot, so it may not stick. YMMV.
Click to expand...
Click to collapse
Hey, in your OP you had instructions to uninstall. I flashed the latest NA stock image from here. I actually did try the fix again since is it was working fine on an earlier build (-67). When I rebooted, there were no signals being found at all. So I re-flashed the stock image and rebooted. So the issue is the same.
The first time I applied the fix, did I make any irreversible changes that could not be undone by flashing stock firmware? Also, did you test this fix on later firmware? Either way, with or without the fix, I'm not connecting to any networks.
Any help would be appreciated!
It's not irreversible.
Best to get an official Motorola image, which includes the radio and other misc partitions, and flash it back to 100% stock with their provided script. It sounds like you have a radio/FSG mismatch.
Hi Guys,
Spend a bunch of time with AT&T trying to get this phone on the data network here in the USA. When the phone first boot I can get on the data network for about 15 seconds and then it seems to get blocked or something.
I'm just wondering if this is because its the fake global rom? 9.6.4.0.
It shows as connected and on 4G for AT&T but only calls and texts work, no data. AT&T said that the IMEI number was showing incorrectly and that they had to add it to their system, so it sounds like this is a carrier issue and not ROM issue but just wanted to be sure.
Also as far as the sim card slots, I wanted to use an sd card so that means I need to put the sim in the 2nd sim slot. In the phone it shows 2 IMEI numbers, one of which is 14 characters and the other is 15 characters. AT&T made it sound like a 14 character IMEI was invalid in the US. The odd part is that the IMEI numbers changes slots as I move the SIM card around. the 14 character IMEI number will move to where ever the SIM is installed. Not sure if this matters or not either.
If I reboot the phone I get data for like 15 seconds again and then is stops.
Any ideas on this one? Just wanted to make sure this isn't something up with the fake rom installed (phone was already unlocked when I got it)
So just for good measure I went ahead and flashed the global 9.6.6.0 rom that was release today.
AT&T cannot seem to get this phone activated on their network at all... I get 4G showing in the notification bar, but I cannot get any voice or data.
I know some of you guys have this phone running on AT&T, are you using global roms? Could that have anything to do with me not getting signal? Is it worth trying to flash a chinese rom as well?
I sort of feel this is a carrier issue, but I am certainly not sure.
omniphil said:
So just for good measure I went ahead and flashed the global 9.6.6.0 rom that was release today.
AT&T cannot seem to get this phone activated on their network at all... I get 4G showing in the notification bar, but I cannot get any voice or data.
I know some of you guys have this phone running on AT&T, are you using global roms? Could that have anything to do with me not getting signal? Is it worth trying to flash a chinese rom as well?
I sort of feel this is a carrier issue, but I am certainly not sure.
Click to expand...
Click to collapse
Did you try the volte enabler in dialer? *#*#86583#*#*
Also, are your apn settings correct?
The modem of the global rom is currently broken, nothing will help.
I suggest installing 9.6.11.0 China stable (no ARB) from fastboot and then downgrade to 9.6.6.0 Global using the antirollback method
your modem will work perfectly
omer919 said:
The modem of the global rom is currently broken, nothing will help.
I suggest installing 9.6.11.0 China stable (no ARB) from fastboot and then downgrade to 9.6.6.0 Global using the antirollback method
your modem will work perfectly
Click to expand...
Click to collapse
Ok, I will certainly give that a whirl. It certainly does feel like the modem is not working...
Do I have to downgrade to 9.6.6.0? No harm in staying on the 9.6.11.0 china rom? (Or does it not support English at all?)
I have been unsuccessful getting flashing to work over fastboot, so I must be missing something there. Can I just flash via TWRP? that's already installed and working?
opasha said:
Did you try the volte enabler in dialer? *#*#86583#*#*
Also, are your apn settings correct?
Click to expand...
Click to collapse
Yup, I did try both of those....
omniphil said:
Ok, I will certainly give that a whirl. It certainly does feel like the modem is not working...
Do I have to downgrade to 9.6.6.0? No harm in staying on the 9.6.11.0 china rom? (Or does it not support English? at all)
I have been unsuccessful getting flashing to work over fastboot, so I must be missing something there. Can I just flash via TWRP? that's already installed and working?
Click to expand...
Click to collapse
I have been using China Stable 9.6.11.0. and it's 95% english. Works fine as a daily driver.
4z4 said:
I have been using China Stable 9.6.11.0. and it's 95% english. Works fine as a daily driver.
Click to expand...
Click to collapse
Excellent, Ok, I will flash the 9.6.11.0 in TWRP and hopefully that makes the mode work again.
Thank you guys!
Ok, I now have a working radio after flashing the 9.6.11.0 !!!!! Thank you guys! Data and Voice are now working on AT&T.
So if I wanted to go to the global 9.6.6.0, can i just flash that over this in TWRP?
omniphil said:
Ok, I now have a working radio after flashing the 9.6.11.0 !!!!! Thank you guys! Data and Voice are now working on AT&T.
So if I wanted to go to the global 9.6.6.0, can i just flash that over this in TWRP?
Click to expand...
Click to collapse
Yes, that's what omer919 said would work.
opasha said:
Yes, that's what omer919 said would work.
Click to expand...
Click to collapse
Sounds too easy, but i'll give it a try, lol....
I figure that encrypted partition will be problematic...
I still have the issue where TWRP never stays, I have to flash it via ADB everytime i want to use it. Anf then it only works once and is gone.
EDIT, yeah, that certainly didnt work. Phone boots to a password screen, I really hate encryption and this is why...
Try this:
https://forum.xda-developers.com/mi-max-3/help/help-t3839214
samkatta said:
Try this:
https://forum.xda-developers.com/mi-max-3/help/help-t3839214
Click to expand...
Click to collapse
I'm not getting anything like that. I just did a format of the data and flashed 9.6.6.0. Its just sitting at the android loading screen now, so that didnt work either.
But at least I know that the chinese rom does work. That's a plus, now just to get over to global rom somehow...
wow, it works with att? u getting H or LTE? what city u in? i want to check the city bands
Again, your modem is broken, nothing will help on software part.
if you want china rom, with china bloatware no multilanguage and GAPPS not working good go for it and just stay on china stable.
if you want to install global rom again while having a working modem follow the guide: here
ryanllts said:
wow, it works with att? u getting H or LTE? what city u in? i want to check the city bands
Click to expand...
Click to collapse
I'm in New Hampshire. Its just 4G in this area, but I suspect it will connect to LTE in the appropriate areas.
I have a question regarding 4g. My device shows only LTE instead of 4g. Seems to have quick connection. In theory they are the same but just wondering if anyone having the same?
shadow78 said:
I have a question regarding 4g. My device shows only LTE instead of 4g. Seems to have quick connection. In theory they are the same but just wondering if anyone having the same?
Click to expand...
Click to collapse
I go between 4G and LTE areas (home and work). The phone shows the appropriate connection at each location, They are definitely different things.
omniphil said:
I go between 4G and LTE areas (home and work). The phone shows the appropriate connection at each location, They are definitely different things.
Click to expand...
Click to collapse
Thx what fw are you using? I remember when I had the chinese stable and even before the EU I had 4g showing up. But now even when I go to settings I can only chose LTE and 3g. No 4g option.
shadow78 said:
Thx what fw are you using? I remember when I had the chinese stable and even before the EU I had 4g showing up. But now even when I go to settings I can only chose LTE and 3g. No 4g option.
Click to expand...
Click to collapse
I had the 9.6.4.0 and the 9.6.6.0 global roms, those both had broken modems, no internet access.
I also tried the trick of putting on the chinese rom 9.6.11.0 and then flashing over to the firmware less 9.6.6.0 global. Still broken modem.
The only way I can get working data is to use a chinese rom. These have all worked.
I was on 8.8.9 miui 10, which I then upgraded to 8.9.6. After that I dirty flashed the xiaomi.eu 8.9.6 rom over that. All of those have working radios.
I guess i'm not too concerned about flashing the newer anti-rollback roms anymore, since there is a guide on how to roll back if you need to. But so far on the chinese miui 10 roms the only issue I seem to have is Android Auto not working and Textra (3rd party text app) not keeping its notification alive.
Hi all,
Would like to thank you in advance in taking your time in reading this post. Its my first time (and post) with the XDA forums. I have a few questions I am not sure if Im doing the correct thing so Im hoping for advice for the experts here in the forum to point me in the right direction.
Technical skills - never flashed a phone before but reading the step by step instructions available in the forums.
A few information with my phone to help with troubleshooting
- Purchased with no warranty overseas because they dont sell it here in the Philippines
- Phone came with the following specs
- Android 8 with Nov 1, 2018 patch
- unlock bootloader
- software channel - retcn
- Build number - OPXS27.109-52-10
- Baseband version - M8988_20207.117.02.41-01.01R NCD
Issue:
1. 4G Network - not working at all on the local network. It seems to be able to go to 4G but cannot make outgoing or incoming phone calls/ text or mobile data.
- troubleshooted by resetting phone, changing apn with no luck. Changing it to 3G only seems to make the phone work to make voicecalls/text and mobile connection
2. Random apps crashing - namely - grab (like uber) and spotify.
- tried resetting the phone (and installed just grab app only after reset but still not working) and cleared partition cache boot mode but still no change.
Proposed solution
- installing a new stock rom - should fix the apps crashing issue and 4g issue
- installing custom rom like lineage (discarded this solution because it will disable audio mods) - i bought the moto mods JBL accessory.
questions:
1. Based on this thread - (https://forum.xda-developers.com/z2-force/how-to/how-to-return-to-stock-sprint-t3694783)
- I wish to install stock rom but Im not sure which rom to use. Do I use USC version based on the phones current build number? - OPXS27.109-52-10 or can I change to a different US carrier like verizon ?(related to next question)
2. Is there anyway to change/fix the carrier frequency so it will start accepting 4g locally here?
- will installing a stock rom with a different carrier (i.e. verizon), will that change baseband and accept other frequencies or will I brick my phone?
- Or hope the stock rom with a different patch will fix it? Ive read in forums it could just be the newer patches that giving me issues. The one available for USC is version OPXS27.109-40-7. Upon checking my local carrier and USC band frequencies, both have 5 band with 850ghz frequency available. So Im beginning to think it could be a software rather than carrier issue
3. Because the phone came with a unlocked bootloader, does that mean I will never receive OTA updates from the stock rom? I will have to manually update it when android 9 comes out?
4. software channel - retcn - does that have to do with anything with baseband or installing stock rom? Does this help in any trouble shooting? Ive seen a few threads in the forums with builds with specific software channel in other threads with specific models xt1789 - 02 or 03 or 06. I dont know if that affects stock roms?
-----------------------------------
Maybe it would also help to show my local 4g frequencies and band number
Smart Band is here below
Frequency Protocol Class Band Number
700MHz FDD-LTE/LTE-A 4G 28
850MHz FDD-LTE/LTE-A 4G 5
1800MHz FDD-LTE/LTE-A 4G 3
2100MHz FDD-LTE/LTE-A 4G 1
2300MHz TDD-LTE 4G 40
Sorry for some newb questions and I welcome any other methods of troubleshooting or suggestions you guys can give me. I feel installing stock rom USC carrier is the solution to the problem after all the research I have done, but would like confirmation first from the experts.
Regards
Rj
On mirror.lolinet.com, 109-52-10 belongs to Retail Apac. The newest rom was uploaded is 109-52-12.
If your unlocked bootloader phone is still running the stock firmware, it will be notified when OTA comes.
I'm using an ATT with carrier unlocked so everything is fine to me. With unlocked carrier, you can use any mobile network if the phone baseband supports.
According to basic theory, if the phone was unlocked bootloader, it can be flashed fw from other variants (but there will be problem for each variant situation). It seems none of us here has done this yet.
- Check your phone model, it's on the right of the charger port.
- Open Phone, and type: *#*#4636#*#*. Choose Phone info. Check the preferred network type. If you can receive sms but cannot send, just update your SMSC number.
Most problems can be solved by flashing the stock fw.
Good luck!!!
Thank you
I didn't even know that site until you pointed it out.
I would be definitely be using the APAC software and try and flash the stock rom. I hope it would work and if not I'll try and flashing the older patch version.
Thank you
Will update you hopefully in a week as soon as I fully understand the details of flashing.
Radioband Issue, RETCN and Stockrom app Fix
mr_5kool said:
On mirror.lolinet.com, 109-52-10 belongs to Retail Apac. The newest rom was uploaded is 109-52-12.
If your unlocked bootloader phone is still running the stock firmware, it will be notified when OTA comes.
I'm using an ATT with carrier unlocked so everything is fine to me. With unlocked carrier, you can use any mobile network if the phone baseband supports.
According to basic theory, if the phone was unlocked bootloader, it can be flashed fw from other variants (but there will be problem for each variant situation). It seems none of us here has done this yet.
- Check your phone model, it's on the right of the charger port.
- Open Phone, and type: *#*#4636#*#*. Choose Phone info. Check the preferred network type. If you can receive sms but cannot send, just update your SMSC number.
Most problems can be solved by flashing the stock fw.
Good luck!!!
Click to expand...
Click to collapse
Just giving people update incase anyone is interested. I decided to follow this guide Step E (reflashing back to stock). It worked perfectly for me.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
As you guys know the original Build number was OPXS27.109-52-10. It turns out that was meant for model XT1789-06. It wouldnt be a big deal except my model that arrived was for XT1789-05
Regardless I followed the instructions and installed the latest firmware for OPSC27.109-52-14 for XT1789-06 (https://mirrors.lolinet.com/firmware/moto/nash/official/RETAPAC/)
Installation went fine and all the apps crashing issues went away. However 4G still didnt work.
I decided to see if installation the latest build for XT1789-05 under the link below would help.
https://mirrors.lolinet.com/firmware/moto/nash/official/RETAIL/
It felt more stable, apps not crashing, moto mods still working, and I was able to get get 4G working for internet and sms however phonecalls (both outgoing and incoming) still didnt work. 3G seems to be still stable and working fine at the moment in the Philippines. (note: I have updated APN)
I have decided to leave it alone as I got half my problem sorted (apps crashing) and moto mods still working. Can live without 4G as its mostly connected to WIFI at home and occasionally going out. Crashing apps was more important win for me.
Maybe once Android 9 officially comes out for the phone, it may fix the issue.
I have explored the option of changing the radioband but I heard of nightmares for some users when they switched to USA. I dont know what will happen if I switch to Australia radioband. (i left it to automatic at this time).
Maybe if someone else found the solution, would be happy to try it out.
I'm sorry for you when you still have some problems. My friends mostly use Z2F form T-mobile and Sprint. ATT and Verizon are less. But they work well for all functions.
There's another way you can try. It's the method for dual sim. For eg, you've a Sprint one. You modded the hardware and the 2nd SIM slot is now available. But current Sprint fw only supports single SIM. You can download a dual sim fw, extract it and copy-replace the modem from Sprint fw to dual sim one (I dont remember exactly what modem should keep, sorry). Then, flash the combination fw and the phone runs with dual sim. You can try a stable system and retcn modem or vice versa.
mr_5kool said:
I'm sorry for you when you still have some problems. My friends mostly use Z2F form T-mobile and Sprint. ATT and Verizon are less. But they work well for all functions.
There's another way you can try. It's the method for dual sim. For eg, you've a Sprint one. You modded the hardware and the 2nd SIM slot is now available. But current Sprint fw only supports single SIM. You can download a dual sim fw, extract it and copy-replace the modem from Sprint fw to dual sim one (I dont remember exactly what modem should keep, sorry). Then, flash the combination fw and the phone runs with dual sim. You can try a stable system and retcn modem or vice versa.
Click to expand...
Click to collapse
Nothing to be sorry about, actually really grateful for your input.
Already had a big win by:
1. flashing for the first time ever to stock rom and not bricking my phone in the process
2. all apps are now working
3. moto mods are working
4. alternative solution to 4g issue is available
Just letting you know the my variant already is on dual sim, and I was pretty sure the modem was wiped and reinstalled when I reflashed back to stock. I did find another thread of similar issue. Only solution was really to either change to 3G or fix APN.
https://forums.lenovo.com/t5/Moto-Z...ing-Incoming-and-outgoing/td-p/4068998/page/2
One user commented it could be a carrier issue. (see below)
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07-13-2018 08:41 AM
Hello, guys.!
I've been following this inquiry very close and I've arrived into a very accurate conclusion:
1. This is not a device problem! Motorola devices are not the problem. I've found that Samsung and Huawei devices also have the same problems.
2. This is definitely about service provider network. In my investigation, AT&T is the one having this issue alone.
3. This issue happens only in certain Mexican areas. For example, in Monterey this happens. I went to Chihuahua and CD Juarez just last 3 days and I was able to use 4G and calls without problems.
4. Based on the idea that only happens in certain areas at certain networks, I can only concluded that happens to certain devices as well. Brands, perhaps, as unlocked iPhone does not present this issue.
------
It could be something to do with Volte 4G calls. It has been disabled for the Xforce 1789-05 european models.
I think waiting to Android 9 may be my best solution though I may start try to start troubleshooting and focusing on simcards to see if 4g will work with other carriers.
I've got an ATT Flipout. I could make call and sms normally. But the network could only rise to E+, cannot be up to 3G (several years ago). The problem was phone hardware. The baseband was only available for US.
Z2F was the flagship, so its modem supported many 4G band for other regions.
As you mentioned, I think you should find out what carrier's band would suit your Z2F. Luckily, all Z2F variants have our bands.
Good luck, guy! And hope you'll give us good news!
You have the (05) dual sim variant correct? You're also in the Philippines right? If you look at this link you'll see all the bands supported for your variant, also you can check carriers in your region to see what bands they are using.
If you look carriers in Philippines like Smart you can see what bands they use.
A comparable carrier is Claro in Brazil.
They use the same bands on a GSM network. I would assume that Retail firmware would open those bands, but I'm not 100% sure and maybe the firmware you flashed doesn't. I do see firmware for RETBR (retail Brazil) and I know that (05) variants are used there. So maybe flashing a retbr firmware will open the bands needed since Brazil and Philippines use some of the same bands. I'm not 100% sure on this, it's just my best guess. You're welcome to verify the info linked and do what you will. I'd think the worst case scenario would be borking your imei and having to blankflash, but those tools are around here as well and so long as you DO NOT relock your bootloader you'll find that it is pretty hard to actually brick this phone. That's the best I can come up with to help.
Thank you
41rw4lk said:
You have the (05) dual sim variant correct? You're also in the Philippines right? If you look at this link you'll see all the bands supported for your variant, also you can check carriers in your region to see what bands they are using.
If you look carriers in Philippines like Smart you can see what bands they use.
A comparable carrier is Claro in Brazil.
They use the same bands on a GSM network. I would assume that Retail firmware would open those bands, but I'm not 100% sure and maybe the firmware you flashed doesn't. I do see firmware for RETBR (retail Brazil) and I know that (05) variants are used there. So maybe flashing a retbr firmware will open the bands needed since Brazil and Philippines use some of the same bands. I'm not 100% sure on this, it's just my best guess. You're welcome to verify the info linked and do what you will. I'd think the worst case scenario would be borking your imei and having to blankflash, but those tools are around here as well and so long as you DO NOT relock your bootloader you'll find that it is pretty hard to actually brick this phone. That's the best I can come up with to help.
Click to expand...
Click to collapse
Your correct, its the dual sim 05 variant. I flashed the retail and I do get LTE data. It just the LTE wont work on 4G. So I dont think its purely a band issue because based on your link I have 3 supported LTE bands with the smart network. Its possible its something to do with carrier communicating with the phone. (APN? Volte?)
Question: will flashing a retbr on a retcn cause issue? Does software channel matter? Maybe I can give it a go, but my wife (who i gave the phone to) has been pretty happy with it. I dont think she wants another wipe on her phone. (i think i already reformatted at least 5 times already)
Update
I found this thread with moto z play.
Maybe this will work? It a method to open all baseband channels.
https://forum.xda-developers.com/moto-z-play/how-to/enabling-basebands-mzp-qualcomm-phone-t3684962
harkoliar said:
I found this thread with moto z play.
Maybe this will work? It a method to open all baseband channels.
https://forum.xda-developers.com/moto-z-play/how-to/enabling-basebands-mzp-qualcomm-phone-t3684962
Click to expand...
Click to collapse
I don't know about all that, looks like a recipe for trouble. Are you able to make or receive voice calls? FYI you can go to apn settings, click the 3-dot menu and reset to default. That should pull your apn info from your sim so you should be good to go apn wise.
There was an old method called RadioComm. It used to unlock carrier for Razr HD (and maybe others Motorola phones). But it is more danger than flashing fw.
On my Verizon phones, no APN profile was showed. But on ATT Z2F, APN was automatically set (and showed) for each carrier.
Inbound and outbound calls affected
41rw4lk said:
I don't know about all that, looks like a recipe for trouble. Are you able to make or receive voice calls? FYI you can go to apn settings, click the 3-dot menu and reset to default. That should pull your apn info from your sim so you should be good to go apn wise.
Click to expand...
Click to collapse
Unfortunately still a no go.
I have reset the network settings and used default apn as per your suggestion. I even copied settings from another phone using same carrier and used different calling apps. It's weird but when at 4g
1. Text work
2. Data works
3. Inbound and outbound phone calls doesn't work
Swap to 3g everything works
I'm still trying to convince my wife if I should flash to retbr.
harkoliar said:
Unfortunately still a no go.
I have reset the network settings and used default apn as per your suggestion. I even copied settings from another phone using same carrier and used different calling apps. It's weird but when at 4g
1. Text work
2. Data works
3. Inbound and outbound phone calls doesn't work
Swap to 3g everything works
I'm still trying to convince my wife if I should flash to retbr.
Click to expand...
Click to collapse
Well if everything works on 3g then it sounds like your bands are fine. Sounds more like a volte issue. 4g works, 3g works, calling works, it's just no calls when 4g is on. Are you using an old sim? Have you tried the sim in another phone to see if you experience the same problems with 4g? Some carriers use different sim for different services. What is your preferred network type set to? If it's exclusively LTE, try setting it to LTE/GSM. It sounds more like a sim issue, setting issue, or maybe a registration issue.
41rw4lk said:
Well if everything works on 3g then it sounds like your bands are fine. Sounds more like a volte issue. 4g works, 3g works, calling works, it's just no calls when 4g is on. Are you using an old sim? Have you tried the sim in another phone to see if you experience the same problems with 4g? Some carriers use different sim for different services. What is your preferred network type set to? If it's exclusively LTE, try setting it to LTE/GSM. It sounds more like a sim issue, setting issue, or maybe a registration issue.
Click to expand...
Click to collapse
I dont think its a old sim issue because its only a year old. But I am getting another simcard from another local network to test it out.
Will update with details.
Hello harkoliar, it looks like both you and I share the exact problem. And best of all, or worst depending on how you view it, I am in Malaysia with the same problems, Grab keeps crashing, among other apps just failing to work period.
Software Channel reads RETCN. 05 phone running an 06 firmware.
I noticed you tried to flash a RETAIL firmware, may I know which was the file you used, was it OPXS27.109-34-21?
I don't have much problems with the connectivity and using 4G. Perhaps it may be a difference between telcos in Malaysian and the Philippines.
Oh... And I bought mine from Lazada, where did you get yours. LOL
frozero said:
Hello harkoliar, it looks like both you and I share the exact problem. And best of all, or worst depending on how you view it, I am in Malaysia with the same problems, Grab keeps crashing, among other apps just failing to work period.
Software Channel reads RETCN. 05 phone running an 06 firmware.
I noticed you tried to flash a RETAIL firmware, may I know which was the file you used, was it OPXS27.109-34-21?
I don't have much problems with the connectivity and using 4G. Perhaps it may be a difference between telcos in Malaysian and the Philippines.
Oh... And I bought mine from Lazada, where did you get yours. LOL
Click to expand...
Click to collapse
Same Lazada. Lol. We must have gotten from the same supplier.
Your right, I installed OPXS27.109-34-21. Worked like a charm after that. Please follow the steps provided in the guide - Step E.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
note: be mindful just what version of android your using. Im assuming its also android 8 like mine. If its currently Android 7, i heard its best to install the android 7 rom first then upgrade to 8. You can tell by the versions.
Another user also having the same problems and reinstalled the latest Retail ROM for XT1789-05 - latest version, worked for him as well
https://forum.xda-developers.com/z2-force/help/internet-issue-apps-xt1789-05-t3924795/page2
Please let us know how you go.
harkoliar said:
Same Lazada. Lol. We must have gotten from the same supplier.
Your right, I installed OPXS27.109-34-21. Worked like a charm after that. Please follow the steps provided in the guide - Step E.
https://forum.xda-developers.com/z2-force/how-to/guides-bootloader-twrp-custom-roms-root-t3805737
note: be mindful just what version of android your using. Im assuming its also android 8 like mine. If its currently Android 7, i heard its best to install the android 7 rom first then upgrade to 8. You can tell by the versions.
Another user also having the same problems and reinstalled the latest Retail ROM for XT1789-05 - latest version, worked for him as well
https://forum.xda-developers.com/z2-force/help/internet-issue-apps-xt1789-05-t3924795/page2
Please let us know how you go.
Click to expand...
Click to collapse
Just finished flashing! So far so good, installing apps as we speak! Super excited!
Was your seller named Aukey? I left them a stinker of a review, lol.
Thank you so much for your experience and detailed breakdown of what you did to get right with your, now, wife's phone. :laugh::fingers-crossed::victory:
Different seller but same source most likely
Different seller but same source most likely.
Happy to help and hopefully that did fix all your app problems. :good:
Still credits and thanks to the actual guys who did the guide.
frozero said:
Just finished flashing! So far so good, installing apps as we speak! Super excited!
Was your seller named Aukey? I left them a stinker of a review, lol.
Thank you so much for your experience and detailed breakdown of what you did to get right with your, now, wife's phone. :laugh::fingers-crossed::victory:
Click to expand...
Click to collapse
AUKEY owns coolicool. Same supplier keeps making the same mistake
I converted from T-Mobile to Global the other day and it all went pretty smooth...until I got to work and tried to connect to the WiFi. I don't know exactly what it's called but to use the internet at work we have to login through a portal after connecting to the wifi network. After I enter my credentials, it gives a 5 second count to connect. Upon reaching 0, it immediately disconnects from the wifi and forcing me to start over only to have the same result. It was working before I converted to the Global rom. Is this a network issue that just happened to coincide with my conversion or could this be some kind of bug?
That's probably IEEE 802.1X. Not sure if it can cause this. Maybe try a reset or test with the T-Mobile image again.
Macusercom said:
That's probably IEEE 802.1X. Not sure if it can cause this. Maybe try a reset or test with the T-Mobile image again.
Click to expand...
Click to collapse
How do I return to the T-Mobile image? I haven't seen any image files for T-Mobile. I assume I'll be safe using this tool https://forum.xda-developers.com/oneplus-7t/how-to/op7t-t-mobile-unbrick-tool-to-restore-t4004005?
noxarcana said:
How do I return to the T-Mobile image? I haven't seen any image files for T-Mobile. I assume I'll be safe using this tool https://forum.xda-developers.com/oneplus-7t/how-to/op7t-t-mobile-unbrick-tool-to-restore-t4004005?
Click to expand...
Click to collapse
Unfortunately, I don't know. I have an unlocked EU version of the device.