CarbonRom is an aftermarket firmware based on the Android Open Source Project (AOKP). The team is composed of former members of Team Liquid who have forked the code in an attempt to bring greater speed, better coding, and full authorship to code. The rom was forked at Liquid beta 3.2.1 and has since undergone major code changes and modifications. CarbonRom is supported with very latest and greatest hardware support and fixes frequently by CarbonDev. Please read through our guide on how to flash CarbonROM on your T-Mobile Galaxy S3 SGH-T999.
PAC Man Jelly Bean 4.2.2 v21.0.0 custom rom is compiled by klin1344, XDA recognized developer/contributor. This is the combination of AOSP, CM10.1 and AOKP Roms for Galaxy S3 T999 based on latest official Android 4.2.2 Jelly Bean source code from Google. With the installation of this custom rom on Samsung Galaxy S III, it will gives a different user experience to you with a lot of exclusive features from the latest firmware made throughout the OS. You can update Galaxy S3 to PAC Man Jelly Bean 4.2.2 v21.0.0 custom rom using the tutorial below. This is not official stock firmware released by Samsung, you may need a rooted and custom recovery like ClockWorkMod (CWM) or TWRP to flash the ROM on Galaxy S3 SCH-T999.
Great news for T-Mobile Samsung Galaxy S3 users. CM10.1 Android 4.2.1 has successfully developed and running on T-Mobile Galaxy S3. CyanogenMod (CM) started rolling out CM10.1 Jelly Bean 4.2.1 to various variants of Galaxy S3 after the international version I9300. ROM below is an unofficial CM10.1 4.2.1 Jelly Bean ROM which has some features are still not working. Great thanks to those who are working hard to make CM10.1 buttery Jelly Bean run on all variants of SGS3.