Install AT&T Galaxy S2 SGH-I777 Android 4.2.2 CM10.1 Jelly Bean ROM
How to upgrade AT&T Samsung Galaxy S2 SGH-I777 to the Android 4.2.2 Jelly Bean firmware? Now we can easily update AT&T Galaxy S2 using CyanogenMod 10.1 ROM. CM10.1 is a AOSP based ROM. This ROM is an after market firmware. …