Not long after a Jelly Bean build leaked for the international Samsung Galaxy SIII, a build has surfaced for the T-Mobile version, compliments of XDA-Forums member LuffarJoh. To flash this ROM you need to do the following:
- Download and Install the stock firmware (from Samsung)
- Download the OTA update and apply it (from Samsung)
- Download the .zip (XDA forum)
The actual OTA update is rumored to start rolling out later this month, but if you’re feeling brave head over to XDA and follow the instructions. But it’s always wise to take a backup before proceeding. Happy flashing!