They took forever for 4.1. Whatever ATT says add another 4-6 months minimum. By the time 4.1.2 is ready 5.0 might already be on some devices. It's a good way to have ATT keep users buying their devices though.
4.2 is a better version anyways. ATT employees appear to be intentionally kept in the dark about these updates. I've spoken with several support people prior to the JB update and one told me that ATT was going to skip 4.1.1 and upgrade to 4.2 in late December or early January. Really?
I just upgrade my S2 I777 to Jelly Bean 4.1.2... but i have a really big problem.... when i connected my S2 to any source of energy ( charger or usb ) my cell phone always shuts down... and its like rebooting ( green battery icon , and battery empty icon, and again green battery icon, and again the battery empty icon ), but when i disconnected the energy source, cell phone start working again.... im so mad !!! somebody can help me please !!!!