Develop Bugs

[Q] Upgrade Software on Unlocked AT&T LG G3

I have searched and haven't found any info on how to do this, so please bear with me.
I recently purchased an AT&T LG G3 with the intention of unlocking it and putting it on T-Mobile. I unlocked it and it is now, for the most part, functioning. There are only a few issues: my MMS doesn't work at all and it has all of the AT&T stuff pre-installed. I wan't to download and install the base KitKat kernal on my phone, but I don't know where to get it and I don't want to risk bricking my phone.
So my questions for you are these:
1. Where can I get the base kernal for the LG G3?
2. Will installing that kernal cause any problems with my phone?
3. Are there any suggestions for something else I can do?
Thank you all!

mascaliente said:
I have searched and haven't found any info on how to do this, so please bear with me.
I recently purchased an AT&T LG G3 with the intention of unlocking it and putting it on T-Mobile. I unlocked it and it is now, for the most part, functioning. There are only a few issues: my MMS doesn't work at all and it has all of the AT&T stuff pre-installed. I wan't to download and install the base KitKat kernal on my phone, but I don't know where to get it and I don't want to risk bricking my phone.
So my questions for you are these:
1. Where can I get the base kernal for the LG G3?
2. Will installing that kernal cause any problems with my phone?
3. Are there any suggestions for something else I can do?
Thank you all!
Click to expand...
Click to collapse
How are you planning on flashing anything on a d850??

You cannot flash anything on the D850, because the bootloader is still locked. The kernel is stock so there is no need for change. Check your apn settings to see if there is a T-mobile apn, Google is your friend if it is not there.
Sent from my LG-D850

Sinterion said:
You cannot flash anything on the D850, because the bootloader is still locked. The kernel is stock so there is no need for change. Check your apn settings to see if there is a T-mobile apn, Google is your friend if it is not there.
Sent from my LG-D850
Click to expand...
Click to collapse
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
Click to expand...
Click to collapse
Your bootloader is locked. Sell your d850 and buy the d851

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
Click to expand...
Click to collapse
That is stock D850 from AT&T.
Unless you figured out a way to unlock the bootloader, which, someone asking these kinds of questions wouldn't be able to..

Milkshakes00 said:
That is stock D850 from AT&T.
Unless you figured out a way to unlock the bootloader, which, someone asking these kinds of questions wouldn't be able to..
Click to expand...
Click to collapse
I'm new to this, but I'm not incompetent. I found this tutorial www dot androidrootz dot com/2014/07/how-to-unroot-lg-g3-all-variants dot html, my only question now is if I install the T-Mobile firmware will it in anyway damage the device?

Can't flash anything other than stock at&t firmware unless you wanna brick your device
Sent from my LG-D850

mascaliente said:
I'm new to this, but I'm not incompetent. I found this tutorial www dot androidrootz dot com/2014/07/how-to-unroot-lg-g3-all-variants dot html, my only question now is if I install the T-Mobile firmware will it in anyway damage the device?
Click to expand...
Click to collapse
I think what they are trying to tell you is:
1. only T-Mobile G3's have unlocked boot loaders
2. so only T-mobiles can be rom flashed
3. AT&T boot-loaders are locked, so you can not flash the rom.

Lol the irony. So he/she bought the at&t phone that comes with a locked boot loader (nothing to do with root) and wants to put it on T-Mobile that already have unlocked bootloader? Lmao... Read read and understand what you are asking before talking back to people that are trying to help you.

mascaliente said:
The bootloader on this phone isn't stock. It has the AT&T boot logo, AT&T bloatware, and some AT&T configurations in the settings.
Click to expand...
Click to collapse
icon sets defined in build.prop not the bootloader. If you had bothered to look around here you would have seen at least two methods to change them back to stock. As for bloat, that is not bootloader either, just system apps.
mascaliente said:
I'm new to this, but I'm not incompetent.
Click to expand...
Click to collapse
Seems like you are very, very, very new. A bit less self confidence and more humility will help.
sonspot said:
Lol the irony. So he/she bought the at&t phone that comes with a locked boot loader (nothing to do with root) and wants to put it on T-Mobile that already have unlocked bootloader? Lmao... Read read and understand what you are asking before talking back to people that are trying to help you.
Click to expand...
Click to collapse
This

help

Hi i have g8 b150 lolipop firmware. It is dual sim phone. I dont understand the firmware naming quite a bit cause i just recently purchase this phone. I downloaded the b340 mm firmware but it said that software update failed after flashing. My question is. Do i have to be in latest lollipop firmware so i can flash mm firmware? Can someone explain to me the firmware naming structure for g8 dual sim and give me the link that suit for g8 dual sim firmware cause i dont want ended bricking my g8
Can someone please help me as well how to root this phone. Ive read the thread about rooting but its not working anymore to unlock bootloader. Any tips?

IzArsha said:
Hi i have g8 b150 lolipop firmware. It is dual sim phone. I dont understand the firmware naming quite a bit cause i just recently purchase this phone. I downloaded the b340 mm firmware but it said that software update failed after flashing. My question is. Do i have to be in latest lollipop firmware so i can flash mm firmware? Can someone explain to me the firmware naming structure for g8 dual sim and give me the link that suit for g8 dual sim firmware cause i dont want ended bricking my g8
Can someone please help me as well how to root this phone. Ive read the thread about rooting but its not working anymore to unlock bootloader. Any tips?
Click to expand...
Click to collapse
Are you sure your phone is Dual Sim ? i think b150 is for single sim check here and follow the correct numbers to update your phone to MM.
As per rooting the phone, you'll need to be more specific about why you are unable to do it, you can't obtain the unlock code ? or you can't get the connection through ADB ? or somethig else ?

ptothej said:
Are you sure your phone is Dual Sim ? i think b150 is for single sim check here and follow the correct numbers to update your phone to MM.
As per rooting the phone, you'll need to be more specific about why you are unable to do it, you can't obtain the unlock code ? or you can't get the connection through ADB ? or somethig else ?
Click to expand...
Click to collapse
Yes im pretty sure my phone is dual sim phone. It has dual sim management on setting. And yes i cant obtained the code. Is there any other way? Can u help me to get the code?

IzArsha said:
Yes im pretty sure my phone is dual sim phone. It has dual sim management on setting. And yes i cant obtained the code. Is there any other way? Can u help me to get the code?
Click to expand...
Click to collapse
Search the forum for the firmware update, Here people were mentioning same version and problems with finding the update
As per the unlock code try this one it goes to Chineese Huawei site if that doesn't work/help try contacting Huaweii support.

ptothej said:
Search the forum for the firmware update, Here people were mentioning same version and problems with finding the update
As per the unlock code try this one it goes to Chineese Huawei site if that doesn't work/help try contacting Huaweii support.
Click to expand...
Click to collapse
I dont find any helping post or detail answer on that thread. For the root i got stuck on step 3. Theres nothing on that website. Is it okay if i request the booloader unlock through email? Found that method on p8 lite forum

IzArsha said:
I dont find any helping post or detail answer on that thread. For the root i got stuck on step 3. Theres nothing on that website. Is it okay if i request the booloader unlock through email? Found that method on p8 lite forum
Click to expand...
Click to collapse
i would give it a shoot and send them an email

ptothej said:
i would give it a shoot and send them an email
Click to expand...
Click to collapse
Already emailed the huawei support but they asked me to just use the website. I really wanted to root this device to use TB. I tried flashing all latest frimware single sim or dual sim version but still no luck updating to MM. So my plan is to just root this phone and flashed RR and flashable stock rom available on the thread via TWRP. Is there any other way to get the bootloader unlock code mate? If there is no way to get the code, i plan to just sell this phone.

I successfully updated to MM now im searching for root. Can someone here help me to get the bootloader activation code using your account? I cannot open the unlock page. Please help me.

Nvm. I already rooted my device

Error Code: Secure boot 1002 - What should I do? Please help

Dear XDA community
I recently bought a LG G4 from an online retailer. According to their website they said it was a UK model, which according to the back of the phone beneath the battery it is: LGH815. But then after booting the phone the ROM being used was: LGH815T. Then I typed in the IMEI number and found out it was a: Verizon US model??
Basically I am having trouble identifying my model. The phone apparently came unlocked and rooted, but the person who sent it must have done something wrong because when I flashed a TWRP recovery image to the phone it comes up saying: secure boot error code: 1002.
The good thing is, is that I can boot into the device and still operate it as per usual. But what I want to do is bring the recovery back to normal. I was searching around and apparently there are some KDZ files that can be used just to flash the recovery? Is this correct? If so could you assist me in what I have to do to fix my issue which is: secure boot error 1002.
I would really appreciate any help regarding the matter. :crying:
Tried posting photos, but forum would not let me, all they showed was the model numbers.
Jesse

Higsley said:
Dear XDA community
I recently bought a LG G4 from an online retailer. According to their website they said it was a UK model, which according to the back of the phone beneath the battery it is: LGH815. But then after booting the phone the ROM being used was: LGH815T. Then I typed in the IMEI number and found out it was a: Verizon US model??
Basically I am having trouble identifying my model. The phone apparently came unlocked and rooted, but the person who sent it must have done something wrong because when I flashed a TWRP recovery image to the phone it comes up saying: secure boot error code: 1002.
The good thing is, is that I can boot into the device and still operate it as per usual. But what I want to do is bring the recovery back to normal. I was searching around and apparently there are some KDZ files that can be used just to flash the recovery? Is this correct? If so could you assist me in what I have to do to fix my issue which is: secure boot error 1002.
I would really appreciate any help regarding the matter. :crying:
Tried posting photos, but forum would not let me, all they showed was the model numbers.
Jesse
Click to expand...
Click to collapse
On the play store there is this https://play.google.com/store/apps/details?id=com.peamoon.phoneproductioninfo
This may help you I'd the device it it is a h815t you may not have the ability to unlock the boot loader......
Also try this *#546386#815#*.
This may also help.......
https://forum.xda-developers.com/tmobile-g4/help/twrp-installation-secure-boot-error-1003-t3168385

Use LGUP-NEW to install/flash ...
Higsley said:
Dear XDA community
I recently bought a LG G4 from an online retailer. According to their website they said it was a UK model, which according to the back of the phone beneath the battery it is: LGH815. But then after booting the phone the ROM being used was: LGH815T. Then I typed in the IMEI number and found out it was a: Verizon US model??
Basically I am having trouble identifying my model. The phone apparently came unlocked and rooted, but the person who sent it must have done something wrong because when I flashed a TWRP recovery image to the phone it comes up saying: secure boot error code: 1002.
The good thing is, is that I can boot into the device and still operate it as per usual. But what I want to do is bring the recovery back to normal. I was searching around and apparently there are some KDZ files that can be used just to flash the recovery? Is this correct? If so could you assist me in what I have to do to fix my issue which is: secure boot error 1002.
I would really appreciate any help regarding the matter. :crying:
Tried posting photos, but forum would not let me, all they showed was the model numbers.
Jesse
Click to expand...
Click to collapse
Use LGUP-NEW ( https://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803 ) to install/flash ... the appropriate stock KDZ for your specific model once you ascertain it (LGUP - NEW may recognize your model and you can use that info to find the right KDZ). You will have to re-root the phone if you still wish to have root.
If you do root, suggest you might want to check out steadfasterX's [LOCKED][G4][TWRP][UNOFFICIAL] TWRP-in-FIsH for all locked G4 devices at: https://forum.xda-developers.com/g4/development/locked-twrpinfish-locked-g4-devices-t3573048
It has been tested on locked devices AND unlocked devices. Version 3 Beta 4 and 5 seem very stable and the links are available in the later posts on the site. It works like a charm and has been tested on a quite a number of devices now.
Addendum: I'm wondering if the online retailer may have meant it was carrier unlocked (i.e., so you could use other service provider's sim cards), not bootloader unlocked? That could account for the secure boot error getting TWRP to load.
S.
NB: Don't forget to click the Thanks button when members try to answer your questions and/or solve issues you have encountered.

LG G4 Anti-rollback what can i do?

I want to root an LG g4, the bootloader and/or recovery seem to be missing from the device. Purchased used off ebay. Is the LG LS991 [H811] Model (Sprint) (also seller claimed its unlocked and that seems to be so when i tested my sim). I can only get the phone into download mode, so when i check it with SALT I see the antirollback says "40". I heard the term frankenstine device thrown around before. IS it even possible to root this phone anymore? IS it possible to get access to the bootloader? I feel like i've been walking around in the dark for a while. I would greatly appreciate any advice

SolidIcecube said:
I want to root an LG g4, the bootloader and/or recovery seem to be missing from the device. Purchased used off ebay. Is the LG LS991 [H811] Model (Sprint) (also seller claimed its unlocked and that seems to be so when i tested my sim). I can only get the phone into download mode, so when i check it with SALT I see the antirollback says "40". I heard the term frankenstine device thrown around before. IS it even possible to root this phone anymore? IS it possible to get access to the bootloader? I feel like i've been walking around in the dark for a while. I would greatly appreciate any advice
Click to expand...
Click to collapse
In SALT switch to develop mode (SALT thread FAQ tells how) and then check the ARB again

steadfasterX said:
In SALT switch to develop mode (SALT thread FAQ tells how) and then check the ARB again
Click to expand...
Click to collapse
Hi, I've got a similar issue. US991 bought new 2017 from LG via newegg. Advertised unlocked, assumed that just meant carrier unlocked, which it is, but also has OEM unlock flag in developer options. LGMENU shows ARB=2 but SALT stable shows ARB=20 so won't flash USU. SALT develop mode shows ARB=2.
Do I USU from develop mode? Does this one need USU (have never tried to flash TWRP or root or anything. Any help/guidance is welcome. the MM LG pushed to it in 2017 doesn't have firmware support for VOLTE which i was hoping to get by flashing a new ROM since i have have no calling since the AT&T 3G shutdowm.

ldh37 said:
Hi, I've got a similar issue. US991 bought new 2017 from LG via newegg. Advertised unlocked, assumed that just meant carrier unlocked, which it is, but also has OEM unlock flag in developer options. LGMENU shows ARB=2 but SALT stable shows ARB=20 so won't flash USU. SALT develop mode shows ARB=2.
Do I USU from develop mode? Does this one need USU (have never tried to flash TWRP or root or anything. Any help/guidance is welcome. the MM LG pushed to it in 2017 doesn't have firmware support for VOLTE which i was hoping to get by flashing a new ROM since i have have no calling since the AT&T 3G shutdowm.
Click to expand...
Click to collapse
only H811 does NOT need UsU. The h815 can be unlocked as well but only when you have the unlock bin already as the LG website closed. so: yes you need UsU.
yes keep SALT on develop and flash UsU there. The good thing is that FAQ #1 applies to your device so you could even go back if something is not working as you want it.

Thanks for your help steadfasterX.
US991_UsU_unlock.zip in develop mode worked great.
twrp-3.5.2_9-PREVIEW-275_g4.img worked great.
however, i have a new issue. when i flashed US991_UsU_baseband_flash-in-twrp.zip my SIM is no longer recognized; mobile data can't be enabled, says connection not allowed so can't add an APN. LGMENU shows normal APNs (ATTPHONE, NEXTGENPHONE, etc are gone). has a couple prepay APNs listed that i don't recognize and can't edit thru LGMENU. SALT GPT is H811 which i thought was just for the ROMs. do i need to actually flash H811 basebands? or just flash one of your H811 ROMs like lineage 18.1? not sure how to fix this. again, any help/guidance is much appreciated.

steadfasterX said:
only H811 does NOT need UsU. The h815 can be unlocked as well but only when you have the unlock bin already as the LG website closed. so: yes you need UsU.
yes keep SALT on develop and flash UsU there. The good thing is that FAQ #1 applies to your device so you could even go back if something is not working as you want it.
Click to expand...
Click to collapse
Thanks for your help steadfasterX.
US991_UsU_unlock.zip in develop mode worked great.
twrp-3.5.2_9-PREVIEW-275_g4.img worked great.
however, i have a new issue. when i flashed US991_UsU_baseband_flash-in-twrp.zip my SIM is no longer recognized; mobile data can't be enabled, says connection not allowed so can't add an APN. LGMENU shows normal APNs (ATTPHONE, NEXTGENPHONE, etc are gone). has a couple prepay APNs listed that i don't recognize and can't edit thru LGMENU. SALT GPT is H811 which i thought was just for the ROMs. do i need to actually flash H811 basebands? or just flash one of your H811 ROMs like lineage 18.1? not sure how to fix this. again, any help/guidance is much appreciated.

ldh37 said:
Thanks for your help steadfasterX.
US991_UsU_unlock.zip in develop mode worked great.
twrp-3.5.2_9-PREVIEW-275_g4.img worked great.
however, i have a new issue. when i flashed US991_UsU_baseband_flash-in-twrp.zip my SIM is no longer recognized; mobile data can't be enabled, says connection not allowed so can't add an APN. LGMENU shows normal APNs (ATTPHONE, NEXTGENPHONE, etc are gone). has a couple prepay APNs listed that i don't recognize and can't edit thru LGMENU. SALT GPT is H811 which i thought was just for the ROMs. do i need to actually flash H811 basebands? or just flash one of your H811 ROMs like lineage 18.1? not sure how to fix this. again, any help/guidance is much appreciated.
Click to expand...
Click to collapse
well there are 2 problems here:
1. not many us991 users here so less user feedback
2. usually no one wants to stay stock so less user feedback
the main problem is that the baseband files are incompatible with your bootloader stack (hopefully its just that). a fix for that would be creating a new baseband flash file from your modem partition. pls provide it from your backup BEFORE using UsU and I can take a look

steadfasterX said:
well there are 2 problems here:
1. not many us991 users here so less user feedback
2. usually no one wants to stay stock so less user feedback
the main problem is that the baseband files are incompatible with your bootloader stack (hopefully its just that). a fix for that would be creating a new baseband flash file from your modem partition. pls provide it from your backup BEFORE using UsU and I can take a look
Click to expand...
Click to collapse
Thank's again for your help. attached is pre-USU modem from SALT backup

ldh37 said:
Thank's again for your help. attached is pre-USU modem from SALT backup
Click to expand...
Click to collapse
hmm seems it was not attached

steadfasterX said:
hmm seems it was not attached
Click to expand...
Click to collapse
damn. let me try that again.

ldh37 said:
damn. let me try that again.
Click to expand...
Click to collapse
sorry for the delay, went to vacation...
pls try the attached one and let me know how it goes!

How should I move to an unbranded global ROM?

I'm trying to root and update my friends T-Mobile 7T (HD1907) to the most recent generic ROM. She's leaving the country and has no need or desire to keep the T-Mobile branding, and getting on a generic ROM seems like it will allow for faster updates.
I've seen some threads that look like they might help, but having had issues in the past with other attempts on other phones, I know that one little oversight can cause HOURS of frustration.
So I figured I'd ask first and try to save the drama this time.
Where can I get the correct ROM to do what I want on this phone?
I have TWRP installed and have rooted with Magisk.
Current build # is 10.0.3 HD63CB
Carrier configuration version is 2.370001
I appreciate any help on this, thanks!

JustinChase said:
I'm trying to root and update my friends T-Mobile 7T (HD1907) to the most recent generic ROM. She's leaving the country and has no need or desire to keep the T-Mobile branding, and getting on a generic ROM seems like it will allow for faster updates.
I've seen some threads that look like they might help, but having had issues in the past with other attempts on other phones, I know that one little oversight can cause HOURS of frustration.
So I figured I'd ask first and try to save the drama this time.
Where can I get the correct ROM to do what I want on this phone?
I have TWRP installed and have rooted with Magisk.
Current build # is 10.0.3 HD63CB
Carrier configuration version is 2.370001
I appreciate any help on this, thanks!
Click to expand...
Click to collapse
[CLOSED] T-Mobile 7T Conversion to International WITHOUT unlocked bootloader/SIM unlock!
Here is a patched MSM download tool for TMobile OP7T. It will bypass the need to sim unlock before unlocking the bootloader, and will also bypass the need of an unlock token file from OnePlus (hence skip the wait period of 1 week to get the...
forum.xda-developers.com

The key is to force reboot into bootloader mode when u get stuck on pink T-Mobile bootscreen after first "flash-all" script so u can repeat this "flash-all" second try which will then work.

Thanks for that. I managed to unlock the bootloader and update to Oxygen OS 11.0.7.1.HD65AA, which I believe is the most recent global ROM.
The model of the phone still shows HD1907, which I thought should change from the T-Mobile model to the global model in this process, but perhaps this is normal.
Everything seems to be working fine, but I'm a bit concerned it won't update properly if its not entirely "converted" to the global model.

I did the same. All working fine though. It brought me unlocked bootloader to flash the dual sim firmware or global. All works. Only concern I have is ..The unlock bootloader ticker in dev options shows greyed out "Already Unlocked" but, the ticker is in the off position to the left which is odd. My friends was done by token but mine using patched boot msm. Any reason to be concerned ? Perhaps that's going to hinder the re lock and possible re unlock ?