Hey folks we just got some information by a Tweet from @iphone_dev that AT&T is messaging to it’s customers that
AT&T Free MSG: An Important Software Update is Available for your iPhone. To update to iOS4.2.1, Connect to iTunes and follow the instructions.
So just stay away from this message if you are an AT&T user and don’t ever think to Update your iPhone to the iOS4.2.1 because you will be locked and you will loose your Unlock especially for the iPhone4 owners who rely on Ultrasn0w Unlock.
Even though the Update was available ages ago by Apple to iOS4.2.1.
