[How-To] Simplified UNROOT and return to STOCK
Simplified UNROOT and return to STOCK procedure
1) Download recovery.zip and update.zip
- UNZIP recovery.zip to top level of /sdcard (overwrite files if necessary) 
- COPY (do NOT unzip) update.zip in top level of /sdcard   [MD5: 2db9b55305cff37a6b6e402fb8518acf] [Size: 88,007,618]
- Turn OFF USB Storage Mode when you are done, if you used it to copy update.zip to sdcard
2) Install stock recovery
- SKIP if you already have stock recovery
- SHORTCUT (optional) if you have Xionia CWMA Recovery, as a shortcut, skip this step, turn OFF signature verification, and perform Step #3 TWICE.
- from "adb shell" or "terminal" (do not type the $ and # symbols)
# cd /sdcard/000root
# /system/bin/sh install-vd.sh
# reboot recovery
- press [Vol Dwn] button once to highlight "apply sdcard:update.zip" [pic]
- press the [Menu] button to run the ZVD updater [pic]
- after around 75 seconds (based on class 6 sdcard) it will return to the recovery menu [pic]
- press the [Menu] button to continue the rest of the install (write the radio, boot android, recreate dalvik-cache). [pic]
- after 3-7 minutes you should be booted into Android
Note #1: After 7 minutes, if your phone is still stuck at the Android logo, perform this procedure.
Note #2: If for some reason you need to re-root: ZVD [GingerSnap] [GingerBreak]
4) Reboot to recovery
- unplug usb cable, power down, wait until ALL lights are off, simultaneously press and hold [Power] [Vol Dwn] [Home] until Recovery shows up, release buttons
5) Wipe your data
- press [Vol Dwn] TWICE to highlight "wipe data/factory reset" [pic]
- press [Menu] to select
- press [Vol Dwn] SEVEN times to highlight "Yes -- delete all user data" [pic]
- press [Menu] to select
Note: If you want to scrub even your Sprint data login information and phone # from NVRAM, for example if you were to transfer/sell the phone to someone else, perform a ##786# reset from the dialer in Android (you'll need your MSL/SPC/Service Code - ask Sprint or use CDMA WS) Make sure you have the stock recovery properly installed (step 2) before you do this or you *may* brick your phone. It is worded to sound dangerous just so you pay attention. Xionia recovery 12518.6 and higher does not have brick issue.
- Full ZVD update.zip (works from any version)
- Revert to V9 using KP500
Last edited by sfhub; 12-27-2011 at 07:23 PM.Thanked by 27:
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- 03-12-2011, 01:21 PM #2
- 91 Posts
- ThundeROM 1.8.3
Nice and simple, indeed!
So if I wanted to unroot and return to stock V9, I'd have to go through the LG updater again to get back to VD?
Is it possible to just restore the NAND backup I made of the VD stock before I rooted to be unrooted again?
Last edited by pcubed; 03-12-2011 at 01:36 PM.
- 03-12-2011, 01:39 PM #3
You can restore your NAND backup of VD, but it isn't necessary.
You might ask how come you can't just restore a NAND backup of stock and return a phone. You could do that and most techs would probably miss things like "su" in your /system/bin, mismatched radios, etc.
This method assures you that the recovery is stock v9, android (all of /system) is stock V9, and all your /data has been scrubbed of remnants.
- 03-12-2011, 01:56 PM #5
Last edited by sfhub; 03-12-2011 at 02:38 PM.
- 03-12-2011, 08:00 PM #7
Do I use the LG update tool? The step to install the custom ROM is confusing me.
- 03-12-2011, 09:02 PM #9
- 415 Posts
- Cold As Ice
- 03-12-2011, 11:06 PM #11
OK. Last questions I promise.
1) Use terminal emulator on phone to get back to stock recovery
Connect phone via USB to PC and
2) Use the LG updater to flash the latest ROM
These 2 steps will set my phone back to Sprint stock and get a new one? Do I have to worry about VC/VD, etc.?
For step 2, you can either use KP500, which will allow you to specify which ROM you want V8, V9, VC, VD, or you can use LG Software Updater which will only allow you to update to VD.
Personally I would suggest KP500 because it is more flexible (it uses parts of LG Software Updater to write to the phone) You might not need that capability now, but it could be useful to you in the future.
Both will work though.
- 03-12-2011, 11:39 PM #13
- 03-13-2011, 12:22 AM #15
- 03-13-2011, 01:19 AM #16
- 03-13-2011, 12:32 PM #18
- 03-13-2011, 01:52 PM #20
I just downloaded NROM 1.5.2 and checked. Yes, it is putting the bootanimation in /data/local.
If you wipe data/cache from recovery it will definitely get rid of the animation.
- 03-13-2011, 08:30 PM #23
- 03-24-2011, 04:56 AM #24
- 03-24-2011, 09:12 AM #25