If you are a regular reader of this blog, I assume you might have updated your LG Optimus Black P970 to official ICS that was rolled out months back. Since the update might not have been available Over The Air (OTA) for some people, I posted a tutorial on how to do it manually. The sad part about the upgrade is that you can root your device but there is no CWM support yet which means you don’t get to install CyanogenMod 9 or CyanogenMod 10 ROMs on your Optimus Black. After interacting with people in the comments section on the ICS upgrade tutorial, I could see most of them asking about how to get CWM. Since you can not get it on ICS, I decided to post a tutorial to roll back to Gingerbread, root it and then flash CWM on it.
This will be a complete guide for you to hack your Optimus Black and make it run the way you want it to.[box_light]Before I begin, I would like to repeat the same usual line to prevent myself from being abused of bricking your phone. We are not responsible for any damage that might happen to your device. We don’t ask you to proceed with this tutorial, you do it at your own risk. Hack My Android is not liable for any damage your phone might incur.
By following this tutorial, all data on your phone will be wiped. So we request you to backup data on your phone using our backup guide. Also, please download the latest drivers for your phone since your PC needs to communicate with your phone during the process.[/box_light]
Steps to Unbrick/Flash Rooted Stock Gingerbread
Download rooted V20s firmware (I couldn’t find any binary files for unrooted stock ROM. If you do, please leave a comment below) and extract the contents of the zip file. You will get the .bin and .fls files needed. You can flash them using SmartFlash Tool. I wouldn’t like to repeat the steps, so you can refer the ICS upgrade tutorial for the steps because the procedure is same. You only need to change the files to be flashed.
CWM On Gingerbread
- Download Clockworkmod v220.127.116.11.
- Extract the contents of the zip file to a separate folder on your PC.
- Enable USB Debugging on your phone.
- Connect it to the PC via the USB Cable.
- Open the folder where you extracted the content of the zip file on Step 2.
- Run the file install_recovery.bat (as administrator) on Windows or install_recovery.sh on Linux.
- Grant root access on the phone when Superuser pops up.
- CWM will be installed on your phone.
To boot into CWM, you can use Quick Boot app or issue the command adb reboot recovery if you know how to work with ADB commands. You can now flash CyanogenMod ROMs on your device which can be found on this page.
If you face any issues, feel free to comment below.