AT&T Samsung Galaxy S II I777 was released back in November, 2012 with Android v4.1 Jelly Bean as operating system. It’s was a high-end device with 2GB of RAM and 1.5 GHz Quad-core processor. This is a list of custom roms that you can use to upgrade your AT&T Samsung Galaxy S II I777 to the latest version of android.
The AT&T Samsung Galaxy S II I777 features a 5-inch 1080p display and a 8MP camera with 16GB internal storage. Although it didn’t receive official updates from HTC, you can use below custom roms to enjoy latest features of Android.
I am not responsible for bricked AT&T Samsung Galaxy S II I777s, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about ROMs included in this list before flashing it! YOU are choosing to make these modifications, Happy flashing!
SHOstock3 RoM for i777
- Android Version: v4.1.2 JellyBean
- Bugs: No Major Bugs
- Last Updated: October, 2013
- Links: http://forum.xda-developers.com/showthread.php?t=2005266
SlimKat
- Android Version: v4.4.4
- Bugs: No Major Bugs
- Last Updated: November, 2014
- Links: http://forum.xda-developers.com/showthread.php?t=2760074
CyanideL
- Android Version: v5.1.1 Lollipop
- Bugs: Same as CM
- Last Updated: May, 2015
- Links: http://forum.xda-developers.com/galaxy-s2-att/development/cyanogenmod12-rom-unofficial-t2959753
CarbonRom for the SGH-I777
- Android Version: v4.4.4
- Bugs: No Major Bugs
- Last Updated: December, 2014
- Links: http://forum.xda-developers.com/galaxy-s2-att/development/rom-carbonrom-sgh-i777-sgh-959g-t2845008
LiquidSmooth v4.0
- Android Version: 5.0.x Lollipop
- Bugs: Some Bugs
- Last Updated: December, 2014
- Links: http://forum.xda-developers.com/galaxy-s2-att/development/rom-liquidsmooth-v4-0-android-5-0-sgh-t2965365
Ubuntu Touch for the i777
- Android Version: N/A
- Bugs: Some Bugs
- Last Updated: April, 2013
- Links: http://forum.xda-developers.com/showthread.php?t=2173773
