Possible Duplicate: Will factory resetting my device remove the Android upgrade? If I reset my phone to the factory defaults, will I lose any OS updates I did?
Upgraded my phone from 1.6 to 2.2 Android version, if I restore “Factory Settings”, which version it will be? [duplicate]
Possible Duplicate: Will factory resetting my device remove the Android upgrade? I upgraded my Galaxy 551 from 1.6 to 2.2 Android version some time ago with Samsung Kies, now I want to make ...
Recently I had a problem where my Nexus S phone would not upgrade to Jelly Bean. During the upgrade process I was getting an error message saying one of the files on my current system is corrupted, so ...
I have upgraded my phone to Android 2.1. I need to reset my phone but I don't want to lose the upgrade. Is it possible to do this? How?