Now that 4.2 AOSP and CM10.1 ROMs have had more than a few releases, momentum seems to be picking up. Much like the frenzy of AOSP-based ROMs over the summer, it started with just a few and has become more widespread very quickly. Now, two more devices have gotten unofficial CM10.1 ROMs: the AT&T Samsung Galaxy S III and the T-Mobile Samsung Galaxy S III.
XDA Recognized Themer itsmikeramsay released the ROMs for both devices. This is likely because the US variants of the Galaxy S III are very similar. As such, the list of things not working on these early builds are identical and include:
~ MTP Support (May Show SD-Card as Internal Storage and Vice-a-Versa when mounted)
~ Bluetooth is sporadic (Works from boot, don’t turn if off if you need it)
~ Headphone jack doesn’t work ONLY during calls
~ Lockscreen shortcuts FC when setting “System Icons” outside of Stock Theme
Another important thing to note is that the internal storage does not get deleted, but rather it is simply moved to /storage/emulated/0. It’s been a trend that the internal SD card is changed somewhat when flashing Android 4.2 due to the multiple users feature—even on phones, which don’t normally have access to this feature. The 0 stands for the primary user. Since the issues all have workarounds for the most part, these are actually very good ROMs if you don’t mind not having a camera.