Develop Bugs

US998 to LS998 *Sprint LTE + Root*

If you mess up your device I'm not responsible, it works for me, and for others. I will help as much as i can, but it is on YOU, the user to follow the prerequisites and read carefully. This zip was created in collaboration with @TxanMoe and myself
This zip can be used to return to the stock rom(for the most part, you'll still have fastboot,root,twrp) as long as you can get into TWRP recovery on the device. It also flashes the modem bands needed for working Sprint LTE(bands 25,26,41, ect.."all the Sprint bands")
Prerequisites:
1. Activate with Sprint first if you intend to use the converted US998 on Sprint!
2. You already crossflashed to US998 if not follow the guide here "Frankenstein method" [https://forum.xda-developers.com/lg...sflashing-t3780969/post76510671#post76510671]
3. You followed the bootloader unlock, root, TWRP "WTF" thread here https://forum.xda-developers.com/lg-v30/how-to/wtf-lg-v30-t3790500
(US998 to LS998) Downloads: (Sprint LS998 system,boot,modem)* MAKE SURE TO FLASH MAGISK, NO-VERITY OPT ENCRYPT, AND RCD DISABLER BEFORE LEAVING RECOVERY!!*
Sprint 20b
https://drive.google.com/file/d/1aQojUcchnEruHwnecfaVGToxZbmj-UX3/view?usp=drivesdk
Sprint 21a(may security patch)
https://drive.google.com/file/d/1JCalyu7mt8DW6wMWbgGViqj0oi9eUSr7/view?usp=drivesdk
*Instructions*:
a. Make a backup in TWRP of system,boot,and data before proceeding!
b. Reboot to TWRP and wipe data (factory data reset)
c. Install the SPRINTLS998.zip (20b or 21a)from TWRP (Do NOT leave recovery yet)
d. Flash Magisk, no verity encrypt, and RCD disabler(you should already have these files if you followed the WTF thread)
e. Reboot
d. Once booted up you need to connect to WiFi. go to settings, update profile and prl. Reboot
quantemplation said:
For anyone who flashes back to Sprint but needs to edit the APNs still, you can type this in command prompt(from PC)
Code:
adb shell
su
am start -n com.lge.hiddenmenu/com.lge.hiddenmenu.ModemProtocol.ModemProtocolMain
Then go to PDP Setting
Then go to APN setting
Click to expand...
Click to collapse
be sure to thank his post here
https://forum.xda-developers.com/showpost.php?p=76633700&postcount=45
JonnyTrulove said:
@JWnSC thanks to the help of some of you great people in this thread I have had the chance to do this conversion twice now. Both times it worked great but I did have to update the APN settings before getting mobile data to work for me. I know you were kind enough to include screenshots of the right APN settings but I just wanted to share that both times I used the ##SCRTN## dialer code to force OTA provisioning and it worked, so I thought you may want to add that option to your first post. Might be a good option for someone that's in hurry to get connected.
Only negative I can think of is that you would not have tethering unless you were subscribed or you manually added the "Dun" provision to the APN later.
Just wanted to share in case you thought it was worth adding to your original post. If not, no biggie. Thanks
Click to expand...
Click to collapse
Special thanks:
@TxanMoe for finding the bootloader exploit and helping me along the way
@ChazzMatt for his in depth Guides and help in this forum
@SGCMarkus for TWRP recovery for this device and all the roms he provides
@quantemplation
@JonnyTrulove
and to any others I may have missed..

Here is a zip for warranty exchange ect...*NOT Recommended* (you will lose root, TWRP)
https://drive.google.com/file/d/19FHVNn6TS5ybdNIziL1nyKPWcIc_RN0t/view?usp=drivesdk
From TWRP(wipe data) install the FACTORYSPRINT.zip reboot device, update prl and profile, reboot, do a system update
It works. I tested it

I'll give this a real-world run-through tomorrow when my new LS998 arrives.

SilverZero said:
I'll give this a real-world run-through tomorrow when my new LS998 arrives.
Click to expand...
Click to collapse
I tested it myself to make sure it works. Working on creating a full back to stock zip for warranty exchange ect.. Will post that after I test and know all is well.

JWnSC said:
I tested it myself to make sure it works. Working on creating a full back to stock zip for warranty exchange ect.. Will post that after I test and know all is well.
Click to expand...
Click to collapse
Yeah...it sucks we need this...sprint not allowing access to kdz is a load of bs...it is much appreciated that we have you helping to support us sprint users...i am looking back at my past lg phones now to see if i can find the process of creating a working kdz...one of the people i think in the g2 or g3 forums actually created a kdz using the untouched signed lg files and it was fully flashable to get back to 100% stock...i don't know if too much has changed since then to do this again...but it would be nice to have for some...me...i won't be doing anything that removes my bootloader unlock and root...but those with warranty may want to have that ability...thanks to all that have contributed to making this a great device...i missed root on a level people outside these forums may never understand

Could you tell me if i could switch out your LS998 bins for h933 ones? also on my dump from lgup can i just change _com6 to .bin ?

cre4per said:
Could you tell me if i could switch out your LS998 bins for h933 ones? also on my dump from lgup can i just change _com6 to .bin ?
Click to expand...
Click to collapse
Right. change "_COM#" to ".bin" should be fine as long as the rsa keys match for the devices you are flashing. Don't flash nougat to Oreo or vice versa

JWnSC said:
Right. change "_ whatever com #" to ".bin" should be fine as long as the rsa keys match for the devices you are flashing. Don't flash nougat to Oreo or vice versa
Click to expand...
Click to collapse
perfect will give it a try, hoping this will let me get volte back on mydevice

JWnSC said:
Here is a zip for warranty exchange ect...*NOT Recommended* (you will lose root, TWRP)
https://drive.google.com/file/d/19FHVNn6TS5ybdNIziL1nyKPWcIc_RN0t/view?usp=drivesdk
From TWRP install the FACTORYSPRINT.zip reboot device, update prl and profile, reboot, do a system update
It works. I tested it
Click to expand...
Click to collapse
Could you lock the bootloader after this? Or will it show an error?

guapinoy said:
Could you lock the bootloader after this? Or will it show an error?
Click to expand...
Click to collapse
Bootloader would still be unlocked but the message after every boot would disappear and you won't be able to enter fastboot. (After you do the system update)
I thought after installing the latest update it would lock the bootloader...it didn't, but it did remove the text after every boot saying to lock bootloader and you won't be able to enter fastboot after. Activating developer options will show the boot is still unlocked. It does change the software info to LS99821a instead of US99820a
To lock the bootloader, you could probably flash the other Sprint zip(without flashing magisk ect..) and just sprint recovery or the factory zip. Reboot to bootloader from twrp and lock it that way. Then do the Sprint system update *I have to do more testing tho I don't recommend doing this until it's tested*

I have followed WTF thread for my Spring LS998. I have also flashed the modem.bin. I have working LTE on US99820a. I went to try and update PRL and Profile but clicking the buttons does nothing at all. Is this common? Also, i noticed that text messaging are received intermittently. They come in, in bunches, but only immediately after I send out a text. has this happened to anyone else?
I'm assuming if i flash the SPRINTLS998.zip, it will correct this issue, but I don't want to if there is no need and there is a fix. I want to try out DotOS, but don't want to carry my texting and MMS issues over from my current U99820a setup.

Omatter4 said:
I have followed WTF thread for my Spring LS998. I have also flashed the modem.bin. I have working LTE on US99820a. I went to try and update PRL and Profile but clicking the buttons does nothing at all. Is this common? Also, i noticed that text messaging are received intermittently. They come in, in bunches, but only immediately after I send out a text. has this happened to anyone else?
I'm assuming if i flash the SPRINTLS998.zip, it will correct this issue, but I don't want to if there is no need and there is a fix. I want to try out DotOS, but don't want to carry my texting and MMS issues over from my current U99820a setup.
Click to expand...
Click to collapse
You can't update profile/ prl on US998 firmware(or at least I couldn't). Backup your setup and try DotOS if you already have working lte. This thread is mainly for users to get lte back. I'm not running the stock Sprint firmware. I switched to stock firmware first to get lte working and switched back to us998 rom.
If you wipe data and flash the SprintLS998.zip you won't have any issues. It already contains the Sprint modem, system, and boot. No need to flash the modem from the other thread.

Will flashing the sprint zip only have bands 25,26 &41?? I'm in an area with band 13 also.. Thanks.

Lurien said:
Will flashing the sprint zip only have bands 25,26 &41?? I'm in an area with band 13 also.. Thanks.
Click to expand...
Click to collapse
???
If you flash the Sprint modem you'll have all the Sprint bands.
It's just the US998 does not have LTE bands 26 & 41. So you have to flash the Sprint modem to get them. If the LS998 normally has LTE band 13, then you'll have that.

Have any of our few sprint users taken latest update and tried to bootloader unlock and root their devices?...just wondering if they actually managed to patch it yet...

jamesd1085 said:
Have any of our few sprint users taken latest update and tried to bootloader unlock and root their devices?...just wondering if they actually managed to patch it yet...
Click to expand...
Click to collapse
I tested the latest update, it installed. I dumped the modem, system and boot from it. I can make a zip from it later. My bootloader was still unlocked tho. I plan to lock it and test..been putting it off, don't want to get stuck on stock haha. I need my phone this week. I'll test this weekend. After the latest update it removed the bootloader warning and I couldn't enter fastboot but the bootloader still showed unlocked under developer options.

JWnSC said:
I tested the latest update, it installed. I dumped the modem, system and boot from it. I can make a zip from it later. My bootloader was still unlocked tho. I plan to lock it and test..been putting it off, don't want to get stuck on stock haha. I need my phone this week. I'll test this weekend. After the latest update it removed the bootloader warning and I couldn't enter fastboot but the bootloader still showed unlocked under developer options.
Click to expand...
Click to collapse
How did you install? Because twrp is there it failed on mine

jamesd1085 said:
How did you install? Because twrp is there it failed on mine
Click to expand...
Click to collapse
I flashed the factory back to stock.zip and went to settings, system update.
Not worth it imo...I was testing the factorysprint.zip to make sure it worked. I can make a flashable zip later(to only include system, modem,boot)..I don't think much changed. Looks like it was just an update to disable fastboot and access to recovery

Omatter4 said:
I have followed WTF thread for my Spring LS998. I have also flashed the modem.bin. I have working LTE on US99820a. I went to try and update PRL and Profile but clicking the buttons does nothing at all. Is this common? Also, i noticed that text messaging are received intermittently. They come in, in bunches, but only immediately after I send out a text. has this happened to anyone else?
I'm assuming if i flash the SPRINTLS998.zip, it will correct this issue, but I don't want to if there is no need and there is a fix. I want to try out DotOS, but don't want to carry my texting and MMS issues over from my current U99820a setup.
Click to expand...
Click to collapse
The first time I tried the profile and PRL updates they took a while to actually launch. Not sure if yours would if you just waited a bit longer (like a minute). I would try that and then the Sprint zip (that's actually more likely to fix your issue).

SilverZero said:
The first time I tried the profile and PRL updates they took a while to actually launch. Not sure if yours would if you just waited a bit longer (like a minute). I would try that and then the Sprint zip (that's actually more likely to fix your issue).
Click to expand...
Click to collapse
I had to connect to wifi when i updated profile...it kept telling me to contact carrier when i tried to update through data connection

Before factory reset. Proper backup.

Hi.
I need to do full backup of my xt1635-02.
It is not rooted. Is there a way to have backup of contacts, app, wifi settings, gmail account settings and so on just in one file? Like TWRP or ClokworkMode. Without need of root.
My device is making weird thing, from dissapearing of wifi to making mess with files.
It is time to reset.
But do not want to spend whole day doing it.
Any advice appreciated.

mazak23 said:
Hi.
I need to do full backup of my xt1635-02.
It is not rooted. ... Like TWRP or ClokworkMode. Without need of root.
Click to expand...
Click to collapse
You do not need root for using twrp, but your device needs to be unlocked. If you didn't do it already, it won't help: unlocking wipes all data.
Best thing I see in this case is adb backup. Plug the usb cable, start "adb backup -all". You may search for help using Google "adb backup", there should be some instructions available.
As i unlocked all my devices, I did not use adb except some tests and never restored anything. I'm myself using twrp and Nandroid backup.

tag68 said:
You do not need root for using twrp, but your device needs to be unlocked. If you didn't do it already, it won't help: unlocking wipes all data.
Click to expand...
Click to collapse
tag68
Thank you a lot.
But how to unlock my device. After adb backup I want to do it for future.

mazak23 said:
But how to unlock my device. After adb backup I want to do it for future.
Click to expand...
Click to collapse
It's nearly the same for all devices by Motorola. Just search for some instructions.
Get code from your device via fastboot/adb
Enter that code in a website by Motorola
Receive unlock code
Enter that code twice (first: enter again to assure you want to do that) to you device via fastboot/adb
Then it wipes your device and is unlocked.
Booting afterwards you have 5 seconds delay and a message that your device is unlocked, on every boot. This is to make you confident that your device is configured right, at least I see it this way.

Done. But it looks small, only 128 Mb of data, what really it saves? Anything from my first post?

Hi, I am feeling so bad, that I am writing offtopic, but I can't already create new topics and I got my device hardbricked, and I need size of all partitions (I mean not only /system /data etc., but all partition from chip) can anyone provide it to me?
Also cat /proc/emmc and cat /proc/partitions will be helpful. So again, for anyone reading this, who has root. Help me please, this information is needed to rawprogramme0.xml and patch0.xml that are needed for unbricking. It will enable everyone to ressurrect their devices.

What happened that you brick it? My is not rooted and I dont want it, so probably I cannot help.

mazak23 said:
What happened that you brick it? My is not rooted and I dont want it, so probably I cannot help.
Click to expand...
Click to collapse
Hi, thank you for response. I hard-bricked it by doing OTA after downgrading phone firmware. I have made partition tables from leaked firmware so I don't need them anymore, but you will help me very much, providing backup of your chip. This will allow to create unbrick solution for everyone with that phone. Here is the thread I finally could make:
https://forum.xda-developers.com/moto-z-play/help/one-best-to-moto-z-play-xda-community-t3902951
This contain instructions and all info. If you don't have root it is still ok, you don't need to have it

Question [Question] Who has rooted TMOBILE 9Pro Stock ROM

I understand I can convert to EU.... However, I don't wish to do that. I just want to root my stock TMOBILE ROM.
My sim is unlocked and I have the unlock.bin from OnePlus for my phone. For anyone who has rooted TMOBILE stock ROM, which boot.img did you patch? I've read that AA boot image can work, but no firsthand accounts confirming this.
Ideally, I'd like to use my own boot.img but I can't find a tutorial or guide anywhere advising how to obtain my boot.img without root.
Thanks!

use AA boot img, but recommend unlocking Bootloader and backing up your tmo modem a/b imgs

How to guide
[TMO] 9 PRO MODEM RETENTION/DATA FIX
----- With the release of OOS13, the modem issue no longer exist. Thank you all for the support & help with this unfortunate issue, we had to endure.... ----- EXPLICITLY FOR TMOBILE 9 PRO (I'm not responsible for your failure to read or...
forum.xda-developers.com

Use partitions backup (app) to backup the existing TMO Firmware first and copy your files to a pc before you do anything. As with any flashing you run the risk of wiping your info and stored files..

galaxyuser88 said:
Use partition magic to backup the existing TMO Firmware first and copy your files to a pc before you do anything. As with any flashing you run the risk of wiping your info and stored files..
Click to expand...
Click to collapse
What is partition magic? An app? Software?

Pain-N-Panic said:
What is partition magic? An app? Software?
Click to expand...
Click to collapse
Sorry meant to say partitions backup. Which is an app.
Partitions Backup & Restore - Apps on Google Play
Backup your important partitions to avoid any data or IMEI corruption
play.google.com

Thank you... unfortunately partition backup requires root. So I can't back anything up until I unlock and root....which using the AA boot image to root kinda freaks me out

Pain-N-Panic said:
Thank you... unfortunately partition backup requires root. So I can't back anything up until I unlock and root....which using the AA boot image to root kinda freaks me out
Click to expand...
Click to collapse
It is understandable to be freaked out,. But if you follow the direction letter for letter then you should be fine.
Also good rule of thumb is make sure you have all the drivers and software loaded on your pc, then make sure your pc and phone can talk in adb and fastboot before you start to flash your phone.
I have rooted my stock tmo rom with aa and all good. Of course I went even further and installed the EU version on my tmo bought 9Pro..

galaxyuser88 said:
It is understandable to be freaked out,. But if you follow the direction letter for letter then you should be fine.
Also good rule of thumb is make sure you have all the drivers and software loaded on your pc, then make sure your pc and phone can talk in adb and fastboot before you start to flash your phone.
I have rooted my stock tmo rom with aa and all good. Of course I went even further and installed the EU version on my tmo bought 9Pro..
Click to expand...
Click to collapse
Yep, confirmed, 9pro and my computer can talk. The whole MSM thing is what is worrying me. In the MSM tool, it says it is the TMO -EU MSM. So, once it does it's thing and flashes it all, it should wipe the phone, it would be on the EU rom?
From there, I would need to follow the steps, unlock BL, flash modems, and then download oxygen updater to be able to locally download updates and install?

Question Downgrade from OX12 to Default 11

Hi
how can i downgrade my OP9 pro after i upgraded to OXY12
i thinkg 11 worked better,
can it be done without losing data or apps ?
my OX11 was india version

downgrading will wipe the phone, you can install 11.0.8.8 downgrade zip via local update

MSM tool for OP9pro you can find here : MSM tool OP9pro
More guides how to use it find here : MSM guide
to my knowledge you cannot keep your data.
everrything will be deleted.
still better than OX12...

I also urgently need to get away from A12. I have the backroll file in the internal memory, but I can't find the option for a local update anywhere. Is it just me or has A12 forgotten something.
And for general info, no matter how, data is gone. If rooted, then just make a backup.
But where the heck do I find the option for a local "update". Just out of interest, with the MSM tool it also goes quickly ...

Flying Fox said:
I also urgently need to get away from A12. I have the backroll file in the internal memory, but I can't find the option for a local update anywhere. Is it just me or has A12 forgotten something.
And for general info, no matter how, data is gone. If rooted, then just make a backup.
But where the heck do I find the option for a local "update". Just out of interest, with the MSM tool it also goes quickly ...
Click to expand...
Click to collapse
There is no "local update" on OOS12. You need to download the updater app which works with A12 (OOS12) so you can manually downgrade. But I STRONGLY recommend MSM tool.

MSM is just doing it´s job right now . Thanks for ur information and advice.

LG G8 LMG820UM AT&T STOCK FIRMWARE/KERNEL

Hello, could someone PLEASE provide me with a stock or source for stock firmware for the AT&T LG G8 Thinq (LMG820UM). I've looked everywhere and can only find the U.S. Cellular, Verizon, Sprint, and T-mobile versions (everything except what I exactly need )!!!! The carrier's already unlocked. I wanna unlock the bootloader, flash custom ROMs like LineageOS (and TWRP) and root it and be able to revert back and LOCK the bootloader safely. I have LGup and other tools (though I don't know exactly what everything's for, such as firehose and other bootthings). I don't think cross flashing works and I don't want to do it anyway. Thanx!

PHANX0M said:
Hello, could someone PLEASE provide me with a stock or source for stock firmware for the AT&T LG G8 Thinq (LMG820UM). I've looked everywhere and can only find the U.S. Cellular, Verizon, Sprint, and T-mobile versions (everything except what I exactly need )!!!! The carrier's already unlocked. I wanna unlock the bootloader, flash custom ROMs like LineageOS (and TWRP) and root it and be able to revert back and LOCK the bootloader safely. I have LGup and other tools (though I don't know exactly what everything's for, such as firehose and other bootthings). I don't think cross flashing works and I don't want to do it anyway. Thanx!
Click to expand...
Click to collapse
Haven't seen anyone post their qfil backup of ATT rom, but it may be around. Yeah you won't find a kdz file of att rom because att doesn't allow that publicly.
Do you have att now? I'm guessing from what you say that you do, but you would like a kdz so you can go back if needed?
If you do have att, use qfil to back up ea partition individually, or use (I prefer) the bkerler edl utilities (search google), they take some effort to get up and running, but do a great job once done.
If u don't have att now... why would u want it? U may want to use them as a carrier but I'm pretty sure they still check the device imei, and if it's not one sold by them, some things *may* be restricted. I don't use them, only what I've read from others.
maybe you could explain better exactly what you want to do.

Yeah I have the AT&T phone now, and I want the kdz but don't know how to extract that ) :
And what do you mean they don't have it publicly? What if I extract it and post it?
Do you know anywhere where I could find them? I have and android 10 one with a broken screen (which I use Vysor for) and a working android 11 one.

PHANX0M said:
Yeah I have the AT&T phone now, and I want the kdz but don't know how to extract that ) :
Click to expand...
Click to collapse
you can't extract the kdz, that's not possible. You'll never find an ATT or Sprint kdz, they are simply not available, never will be, never have been.
The only thing you can do is back up what you currently have. Using qfil (look in guides section and you'll find how to set that up and use it) is probably the simplest option. You'll have to back up ea partition, and be sure to name them appropriately, as the back up doesn't do that.
Once you've done that, assuming the sim is unlocked, you can do other things you mention you want. But if the sim is not unlocked, you have to do that first, because flashing a different rom does not unlock it.
good luck

AsItLies said:
you can't extract the kdz, that's not possible. You'll never find an ATT or Sprint kdz, they are simply not available, never will be, never have been.
The only thing you can do is back up what you currently have. Using qfil (look in guides section and you'll find how to set that up and use it) is probably the simplest option. You'll have to back up ea partition, and be sure to name them appropriately, as the back up doesn't do that.
Once you've done that, assuming the sim is unlocked, you can do other things you mention you want. But if the sim is not unlocked, you have to do that first, because flashing a different rom does not unlock it.
good luck
Click to expand...
Click to collapse
So if I flash something custom, and then flash the backed up EA partition, it'll have the AT&T ROM/firmware again? I assume the bootloader has to be unlocked for this?

PHANX0M said:
So if I flash something custom, and then flash the backed up EA partition, it'll have the AT&T ROM/firmware again? I assume the bootloader has to be unlocked for this?
Click to expand...
Click to collapse
You'll have to flash back all the att partitions, not just some part of them. The device won't boot otherwise. And no, the boot loader does not have to be unlocked. Look in the guides section for the 'cross flashing' guide, it will explain what you need to do to make that happen, and you'll need a kdz you want to crossflash to. If you decide to x flash to a stock rom.
If all you wan to do is a custom rom, make sure the version of whatever rom you have, including if it's the att one, matches with the custom rom you want to use.
One note though re custom roms on LG devices; you will never be able to have Volte. That's an issue for US people especially, and other countries are getting there also.
LG, in it's infinite wisdom, has their ims stack (needed for volte to work) all over the rom, people have tried to port it, but it's a proprietary implementation, and has not, and probably never will be, ported. So, if you need volte, then your only option is a stock LG rom.

There's only ONE firehose for LG G8 Thinq all models, right? (If I even need to use that thing)
What are the EXACT things I have to back up to be able to revert back to AT&T ROM/Firmware?
So I know the T-Mobile version doesn't work with VoLTE (I've tried it myself and customer service told me I had to have them disable 3G blocker). But will the factory unlocked ROM work with it on an AT&T phone?
Even if I can't do this, is there ANY other way to go back to AT&T stock ROM/Firmware if I flash something else?

AsItLies said:
You'll have to flash back all the att partitions, not just some part of them. The device won't boot otherwise. And no, the boot loader does not have to be unlocked. Look in the guides section for the 'cross flashing' guide, it will explain what you need to do to make that happen, and you'll need a kdz you want to crossflash to. If you decide to x flash to a stock rom.
If all you wan to do is a custom rom, make sure the version of whatever rom you have, including if it's the att one, matches with the custom rom you want to use.
One note though re custom roms on LG devices; you will never be able to have Volte. That's an issue for US people especially, and other countries are getting there also.
LG, in it's infinite wisdom, has their ims stack (needed for volte to work) all over the rom, people have tried to port it, but it's a proprietary implementation, and has not, and probably never will be, ported. So, if you need volte, then your only option is a stock LG rom.
Click to expand...
Click to collapse
There's only ONE firehose for LG G8 Thinq all models, right? (If I even need to use that thing)
What are the EXACT things I have to back up to be able to revert back to AT&T ROM/Firmware?
So I know the T-Mobile version doesn't work with VoLTE (I've tried it myself and customer service told me I had to have them disable 3G blocker). But will the factory unlocked ROM work with it on an AT&T phone?
Even if I can't do this, is there ANY other way to go back to AT&T stock ROM/Firmware if I flash something else?

PHANX0M said:
There's only ONE firehose for LG G8 Thinq all models, right? (If I even need to use that thing)
What are the EXACT things I have to back up to be able to revert back to AT&T ROM/Firmware?
So I know the T-Mobile version doesn't work with VoLTE (I've tried it myself and customer service told me I had to have them disable 3G blocker). But will the factory unlocked ROM work with it on an AT&T phone?
Even if I can't do this, is there ANY other way to go back to AT&T stock ROM/Firmware if I flash something else?
Click to expand...
Click to collapse
Yes there's only one firehose file, and it does need to be used to when using Qfil. And you need to use Qfil to back up ALL PARTITIONS (not just some, all).
I can't help with specific carrier requirements, I only have used Mint. You'll have to ask the carrier what will and won't work.
No, there is no way to go back to att stock firmware. Period. No Other Way than whats already been indicated, from a back up.

AsItLies said:
Yes there's only one firehose file, and it does need to be used to when using Qfil. And you need to use Qfil to back up ALL PARTITIONS (not just some, all).
I can't help with specific carrier requirements, I only have used Mint. You'll have to ask the carrier what will and won't work.
No, there is no way to go back to att stock firmware. Period. No Other Way than whats already been indicated, from a back up.
Click to expand...
Click to collapse
Thank you for all the information thus far. If I restore the backup it can be completely as it was before and functional, including all data and everything? Do I have to unlock bootloader for this? And can I restore a backup from another phone (of the same model)?
Also, if I use the OPEN_CA ROM it'll let me use VoLTE?
Sorry, I'm only used to working with Xperia . Flashtool with Xperifirm was so much easier

PHANX0M said:
Thank you for all the information thus far. If I restore the backup it can be completely as it was before and functional, including all data and everything? Do I have to unlock bootloader for this? And can I restore a backup from another phone (of the same model)?
Also, if I use the OPEN_CA ROM it'll let me use VoLTE?
Sorry, I'm only used to working with Xperia . Flashtool with Xperifirm was so much easier
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Click to collapse
If you restore the backup the phone should then be back to 'stock'. The data partition backup would be probably in excess of 40 gig, no one backs those up.
No, the bootloader only needs to be unlocked if you want root access, this doesn't require root.
Volte depends on numerous things, 1 obviously being that the phone is capable of it, then the carrier has to have that capability, and it has to allow your specific device to use it on their network. I haven't used the open_ca rom so can't say, but have used the us_open in the States, and with Mint mobile it has definitely worked, as has vowifi.
good luck

AsItLies said:
If you restore the backup the phone should then be back to 'stock'. The data partition backup would be probably in excess of 40 gig, no one backs those up.
No, the bootloader only needs to be unlocked if you want root access, this doesn't require root.
Volte depends on numerous things, 1 obviously being that the phone is capable of it, then the carrier has to have that capability, and it has to allow your specific device to use it on their network. I haven't used the open_ca rom so can't say, but have used the us_open in the States, and with Mint mobile it has definitely worked, as has vowifi.
good luck
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Thank you very much, I've not found such accurate and digestible information elsewhere!
But just to be sure.... I DON'T need to backup the userdata partition? And if I do.... Can I restore it from my old Broken G8 Thinq (which's android 10) to my new one (which's android 11) if I like the apps and stuff better (Both're AT&T). Would I have to unlock the carrier of the old one first (the new one is already unlocked)?
What if it were the same android version? What if it were different preinstalled carrier?
Also does that mean someone can get all my data with use of simple EDL?

PHANX0M said:
Thank you very much, I've not found such accurate and digestible information elsewhere!
But just to be sure.... I DON'T need to backup the userdata partition? And if I do.... Can I restore it from my old Broken G8 Thinq (which's android 10) to my new one (which's android 11) if I like the apps and stuff better (Both're AT&T). Would I have to unlock the carrier of the old one first (the new one is already unlocked)?
What if it were the same android version? What if it were different preinstalled carrier?
Also does that mean someone can get all my data with use of simple EDL?
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Click to collapse
Sorry, I can't be of much help with something like this. I've never tried to back up user data because it's just too much data and I would just prefer to reinstall the apps. Yes, someone could put the device in edl mode and pull off the user data, but if it's a stock device, it will be encrypted.

AsItLies said:
Sorry, I can't be of much help with something like this. I've never tried to back up user data because it's just too much data and I would just prefer to reinstall the apps. Yes, someone could put the device in edl mode and pull off the user data, but if it's a stock device, it will be encrypted.
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Click to collapse
So you're saying if the ROM (whether stock or not) supports encryption, the data pulled will be useless? And could I restore other partitions backed up from ANOTHER of the same device (whether different android version or not)?
And it's only encrypted if there's a lock code/pattern?
And if the bootloader was unlocked someone could just flash a custom recovery and bypass the lockscreen right?
Also luckily Mint doesn't read the IMEI like greedy AT&T