From ModMyGPhone Wiki
Here, we will update firmware from RC-19 to RC-29. The firmware version( or Build Number) can be seen at Settings > About phone > Build number
As required with any phone mods, make sure the battery is fully charged or atleast more than 50%.
Steps ::
1. Rename the archive to update
2. Copy the file to the SD Card.
Note : Connect the phone to desktop and then transfer the file. Don't take out the SD card and use the card reader.
3. Turn off the phone. Press and hold HOME and POWER button. The phone will start in recovery mode. You should see an exclaimation sign when it starts.
4. Press Alt + L, it will take you to the boot menu,
5. Press Alt + S, to start the update process. It will take a while so be patient.
6. When the update completes, it will prompt you to press HOME + BACK to reboot.
7 . After you reboot, the update will finalize and automatically reboot.
Thats it !
If you have any problems, post here.
