AT&T this morning confirmed what we've known for a couple weeks now -- Android 4.1.2 is pushing to the Sony Xperia TL. Noted is the addition of AT&T DriveMode, which at 25 mph can shut down features of your phone that could be distracting while driving and automatically reply to texts, e-mails and calls, saying that you're driving and are more responsible than your friends and won't be picking up the phone while your hands are on the wheel. (At least that's how we envision it.)
There's also a new camera interface, data usage calculator and improved power management.
If you've yet to get the update, head into the settings menu to get the ball rolling.