I've had an iphone 3G for 2years. For the first 15months, it was used in the UK on the O2 network (not unlocked). Last year moved to Spain... So, unlocked the phone and now use Movistar. All was going well until today. An automatic update took place on the phone. Now, the phone does not recognise the sim card. I've tried the sim in another phone and it works there. And I've tried other sims in the iphone - none of them work (although.. I don't have the original O2, so I can't try that). Any ideas??? Has the update relocked the phone?? Or is there something else that I need to do?? Thanks for any help.