I'm on 2.2.1 with bb 2.28. My iphone's jailbroken and I've installed yellowsn0w. My phone was locked on FIDO (canada). Now I'm in the US and I tried using my friend's SIM CARD (T-Mobile). I turned off my iphone, put the T-mobile SIM card, turned it on and it's only in emergency mode and asks to be connected to itunes. When I connect it to itunes, itunes says "The sim card inserted in this iphone does not appear to be supported." Anyone knows what's going on?