How-To Return SPRINT LG V20 Back To Stock! LS997 ONLY! |Sprint ZV3 system aboot boot

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wren2k

Member
Jul 5, 2010
34
0
I see a few posts in here about this issue.
It seems as if people who used the LGUP flash method to obtain root are having issues returning to stock with this method.
Does anyone have the zv7 modem and baseband images to flash, perhaps that will fix my data/network issue and I'll be fine keeping root.
Try updating your twrp version

Sent from my LG-H910 using XDA Labs
 

Ybenk

New member
Nov 20, 2018
1
0
Help on the img files

hello, i've dowload the files (img's), do they need to be extracted? i got error mesage that the files are corrupted when i tried to extract them.

thanks in advanced for the respond.
 

esqueue

Senior Member
Nov 25, 2007
294
79
Long Beach
Is this still a valid method to return to stock?

My phone was initially rooted using the Dirty Santa method and have sinced chanted roms a few times. I have an LS997 running an Android 7.0 build from i95 swervin. It's using the verizon VS9951BA April, 1 2018 patch. It is a verizon hybrid build that's no longer supported. I don't have wifi calling and voicemail due to the verizon nature of the patch. The only other roms for sprint phones are the ones that lineage ones that kill the hall sensor (close case detector) on these phones with the cases that have an open view.

I want to return to stock so I can have a 100% functional phone. My next phone will be from a carrier that doesn't lock down their phones so hard.
 

pro_granade

Senior Member
Jan 22, 2013
1,038
882
Kansas City
Is this still a valid method to return to stock?

My phone was initially rooted using the Dirty Santa method and have sinced chanted roms a few times. I have an LS997 running an Android 7.0 build from i95 swervin. It's using the verizon VS9951BA April, 1 2018 patch. It is a verizon hybrid build that's no longer supported. I don't have wifi calling and voicemail due to the verizon nature of the patch. The only other roms for sprint phones are the ones that lineage ones that kill the hall sensor (close case detector) on these phones with the cases that have an open view.

I want to return to stock so I can have a 100% functional phone. My next phone will be from a carrier that doesn't lock down their phones so hard.
Yeah as long as you rooted with Dirty Santa and have a LS997 this will get you back to stock.
 
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crumbling9999

Senior Member
Feb 2, 2019
82
52
Its not a problem. Just flash the system.img (or grab the LS997 ROM from the DirtySanta thread) from TWRP, and flash magisk + mk2000 BTTF kernel on top of that. Even without root, since its ZV3, you can use HiddenMenu to change APN to get hotspot for free (add DUN to the APN type)
 

tinohuda

Member
Jan 6, 2012
19
0
My Phones cannot reboot to recovery mode, its always boot loop with text "your device is corrupted and cannot be trusted".

I try to reboot with volume down + connected usb and theres fastboot mode bootloader unlock, theres no listed devices when i run adb command.

I try to reboot with volume down + pressing power and release then press the power again when LG logo appear its factory data reset, and i try to reset it several times but nothing happen, its bootloop.

i try to install TWRP via dirtysanta but its request Terminal Emulator to be installed.

any solutions?

thanks before.
 

vdowner

Member
Apr 8, 2018
22
1
New York
LG V20
Yeah as long as you rooted with Dirty Santa and have a LS997 this will get you back to stock.
I just bought an LS997 which has been crossflashed with US996 firmware. So the hardware is LS997 but the software its running is US996. Theres no signal, so I thought of getting it back to the stock LS997 firmware. But I don't have an unlocked bootloader or root. What should I do? Is there any hope for me?

To get dirty santa, should I go with the US996 method, or the LS997 method?
 

pro_granade

Senior Member
Jan 22, 2013
1,038
882
Kansas City
I just bought an LS997 which has been crossflashed with US996 firmware. So the hardware is LS997 but the software its running is US996. Theres no signal, so I thought of getting it back to the stock LS997 firmware. But I don't have an unlocked bootloader or root. What should I do? Is there any hope for me?

To get dirty santa, should I go with the US996 method, or the LS997 method?
I would try and unlock the bootloader and then use this LS997 method, all that matters is the hardware for this method, as long as you have full root you can use this method to put any LS997 back to stock
 

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    THIS IS NOT AN EASY METHOD, THIS IS NOT FOR NOOBS, SOMEONE CAN SIMPLIFY IT, BUT AS OF RIGHT NOW ITS SOMEWHAT COMPLICATED
    IF YOU'RE PHONE IS NOT ALREADY ON THE DIRTYSANTA BOOTLOADER THEN THIS WILL NOT WORK FOR YOU

    Thanks to @me2151 for giving us these backup files and clearing up the method!

    Prerequisites:
    • Your device needs at least 6GB free on the internal SD Card
    • Your device needs to be able to boot into TWRP and fastboot mode
    • You need access to a computer to run ADB commands to the phone

    Technical Explanation (I suggest you ignore this.)

    Basically, we're going to put the ZV3 system.img on the sdcard, then dd if= it to the system partition, then boot into the bootloader and flash the aboot and boot images and then preform a userdata wipe and reboot.


    Instructions!
    • Backup your phone, this will wipe EVERYTHING off of it.
    • Download the ZV3 System Image and the aboot and boot backup from the 2nd post on this thread.
    • Extract both of these to a folder and have ADB accessable in that folder.
    • Now boot the phone into recovery mode, this can be done easiest by running "adb reboot recovery" from CMD when the phones connected.
    • Once your phone is loaded into TWRP, and you're in the directory with system.img, please run "adb push system.img /sdcard/" and wait for the file to copy over.
    • You can check how far it is by opening the SD Card in the file explorer and checking what the file size is, once it's at 5.46GB it's done.
    • Type into CMD "adb shell" and then paste "dd if=/sdcard/system.img of=/dev/block/platform/soc/624000.ufshc/by-name/system"
    • This process will also take a lot of time, but you cannot check how far it is, CMD will just give a blinking prompt with something around the lines of "~ # [6n" once it's done.
    • After it's finished and you see "~ # [6n" type exit and press Enter.
    • Once you see "~ # [6n" type "TWRP reboot bootloader" into the prompt and press Enter.
    • Once your phone is recognized and you see fastboot open on your phone type "fastboot flash boot bootbackup.img" followed by "fastboot flash aboot abootbackup.img" RUN EACH OF THESE 3 TIMES
    • Once that's completed type "fastboot format userdata", once that's completed type "fastboot reboot"
    • The phone should reboot back to stock firmware! Enjoy!

    Video Tutorial if it helps:
    https://www.youtube.com/watch?v=DXnfm002l6o


    If you have any questions or get stuck somewhere, DO NOT TURN THE PHONE OFF, REPLY TO THE THREAD AND GET HELP SO YOU DON'T BRICK THE ENTIRE PHONE TO A UNRECOVERABLE STATE.
    5
    There, I added a video to make it a bit easier if that helps.
    2
    Oh I ask cause I could use the ZV3 to actually DirtySanta this phone since I am on ZV6. :s

    But thanks.
    You can do it to go back to zv3.... Once on the zv6 bootloader... This is only for people thatvrooted and did the dirty santa

    Sent from my LG-LS997 using Tapatalk
    2
    YOU ARE AWESOME! This worked perfectly - my phone is back to stock. No more "untrusted" screen on boot. Full stock like the day I bought it.

    I'm passing on my phone to another person, so I wanted it back to original software. This rocked it.