Okay the first thing is to go to stock (rooted) 2.3.3 this will work for unbriking and everything. G2X_V21E_00_NVFlash The original thread can be found here.
This is good in case you brick or want to upgrade, you go to a lower version so LG tool let you upgrade.
Originally Posted by ILUHA_89
ROM for recovery G2X under the NVFLASH
This method necessary!
If the device is not loaded and not firmware in other ways! (If you downloaded the wrong firmware in the device)
I took the unpacked program files KDZ and added to them NVFlash and created BAT file!
Download ROM: http://www.mediafire.com/?wfokxjxi7rfoaey
Download APX driver: http://www.mediafire.com/?k559zgjlqkd5ted
- Download both files
- Unpack it to the C drive to their respective folder
- Remove the battery
- Hold Vol Up/Down (and keep them held)
- Insert the USB cable
- Install APX driver from the your APX folder
For windows 7(and vista? please confirm):
- Open Device Manager in Windows and you should see "APX Device" listed with an error
- Right click on the APX device
- Select 'Update driver software'
- Select 'Let me pick...'
- Select 'Have disk'
- Browse to directory you extracted the APX Driver
- Select the *entire* 'APX Driver' folder
- Accept any warnings, including the big red alert (you may need to disable UAC)
- Now in Device Manager under 'USB Controllers' you should have an 'NVIDIA USB Boot-recovery driver for mobile devices'
- If not, uninstall the driver, reboot, rinse and repeat
- Unplug everything
- Hold Vol Up/Down (and keep them held)
- Insert USB cable
- open your ROM folder:
- Run Flash.bat file and wait for the process
- After the logo appears on the LG phone
- Unplug USB cable
- Insert the battery
After that, I recommend to firmware device with help programms KDZ or LG Mobile Update
Now we need to download the kdz files.
The V21Y_00 update (LG T-Mobile branded Android 2.3.4) can be found here
and the Original thread
Use this file for upgrading to the newer baseband.
For downgrading go to this thread
on the first post, if you have a T-Mobile phone download this one
if not the the other.
From this thread
download the offline tool
This tool will let us upgrade or downgrade.
Now the thread provide instructions but many people get lost even with the pictures because there are basic yet important steps he misses.
1-) Unzip the tool.
2-) go to start menu and look for wordpad, do a rick click and run as administrator.
3-) Opend wordpad as administrator, from it, open up the “host” file is under C:\windows\system32\drivers\etc\ or %systemroot%\system32\drivers\etc\ at the bottom add 127.0.0.1 csmg.lgmobile.com
4-)open cmd.exe as administrator, cd to the unzipped directory and run Automatic Offline Procedure.vbs
To open cm or wordpad as administrator you have to do a search in the menu bar and then a right click and select "run as" or "run as administrator"
5-) The script will install 1. MSXML 4.0 SP3 Parser
, let it do it.
6-) The script will also run 2. “windows enabler.exe”
, on the status bar (usually right lower corner) a new icon will show up, do a left click and make sure it says on.
7-) 3. Enable the phone’s “USB debugging” mode (menu>settings>applications>development>USB debugging), connect the phone to PC and wait for drivers to be loaded.
8-) 4. Run "UpTestEX_mod2_marwin.exe" if the script dont already start it. It usually does.
9-) Despite of what the original guides says, the only thing you need to change is select the kdz file.
10-) Press "Normal web upgrade test" > upgrade start >
11-) Select: Clear Phone Software update registry, Select "Different Country" and select your Language. Click <OK>
12-) Ignore any message saying to check the internet and run again, this is good.
13-) Wait until it finishes. If it gives any message that the phone is not connected or something like that, disconnect it, turn it off, remove battery and plug it back holding "Volume Down" key. (Automatically goes to Upgrade mode).
That's it. The same process to upgrade or downgrade.
The last step is to flash cwm. Use the link I provide in this same post.