CM10.1 M3 was released a while ago for the T-Mobile Galaxy S3 SGH-T999 with the latest Android 4.2.2 Jelly Bean firmware update. CyanogenMod 10.1 ROM is one of the few popular AOSP based firmwares that bring the pure Android experience for your phone with no Samsung skins or modifications. CM10.1 final release is not very far [...]

This is a new firmware for T-Moblie Galaxy S3 T-9999, SynergyROM, and is based on Android 4.1.2 Jelly Bean. SynergyROM is fully optimized and runs insanely fast with excellent performance, speed, Multiwindow with free-floating windows, created exclusively by Team Synergy. You can update T-Mobile Galaxy S3 SGH-T999 to SynergyROM Android 4.1.2 Jelly Bean custom firmware [...]

T-Mobile version of the Galaxy S3 can finally been updated to Android 4.2.2 with the help of a custom ROM called as LiquidSmooth. You will require CWM recovery to be able to flash this new Jelly Bean firmware update. Along with the basic features, this ROM will let you experience stock Android along with a [...]

You can update T-Mobile Galaxy S3 T999 with the latest AOKP Build 6 custom ROM, based on the latest Android 4.2.2 Jelly Bean. This firmware is yet to be announced by Samsung for an official firmware release, but thanks to the Android Open Kang Project team, this is now already possible on the T-Mobile Galaxy S3 [...]

Samsung has not announced any plans for Android 4.2.2 Jelly Bean for the T-Mobile Galaxy S3 SGH-T999, but looks like AOKP is already in the lead with their AOKP Android 4.2.2 custom ROM that is already available! Some new features have been added that we have listed below, and like always, a number of new [...]

T-Mobile Galaxy S3 SGH-T999 CM10.1 M2 release is now available which is based on Android 4.2.2 Jelly Bean and can be flashed on this phone as a custom ROM. The official Android 4.2 Jelly Bean firmware update will only be released for the T-Mobile Galaxy S3 after the Galaxy S4 has launched into the market. [...]

Android 4.2.2 AOKP custom ROM is now available for T-Mobile Galaxy S3 SGH-T999, with the official Build 4 release that was released yesterday and brings the latest Jelly Bean software to your phone. There is no word from Samsung on when they would release the official Android 4.2.2 software update for the Galaxy S3 (Android [...]