Reported by Engadget, if you have a Galaxy S III with AT&T, you had the chance to download and install Android 4.1 Jelly Bean since last month, but the rollout wasn't so mooth and it was only limited to updates using Samsung Kies. Not OTA (over-the-air).

Finally, AT&T has Engadget that an OTA (over-the-air) update will be available beginning today to anyone who is still using Ice Cream Sandwich, though it'll require a WiFi connection. Still, this is a much better situation for the vast majority of Samsung Galaxy S III owners who may not have even realized that an update was even offered to them in the first place.