Tried to update yesterday, but when my phone restarted it said 'the sim inserted is not supported. Please insert original sim card.' (its definitley not the wrong sim card) This message was on itunes and on my phone (rendering un-usable). Took it into the apple store and they were stumped. After an hour and almost every 'genius' in the shop having a look, they still had no idea what the problem was, so they just gave me a new phone. Just went to do the update on my new handset...and its happened again. FML.