I would like to unlock my wife's original iPhone which is long out of contract so that I can use it with a PAYG SIM from T-Mobile when I'm visiting the U.S. Her original SIM card is long gone. I had the phone jailbroken but when I plugged it in today I elected to go ahead and update the system software. Now it is asking me for a valid SIM card before it will load the new system software. I tried active T-Mobile (US) and Orange (UK) cards but keep getting the message "The SIM card inserted does not appear to be supported. Only compatible SIMS from a supported carrier may be used to activate iPhone. Please insert the SIM card that came with the phone or visit a supported Carrier's store to receive a replacement SIM card." Since I'm in Scotland, there is no way I can go back to an ATT store. If I can get ATT to unlock this phone, will the unlock code sent by Apple allow me to use the T-Mobile or Orange SIM card to activate the phone? Is there a way to get the system software installed so that I can just use it as a WiFi device for now? Thanks in advance for anyone's help. This is very frustrating. Erik Hansen aka Lownote.
You can "hacktivate" your iPhone. I'm not sure wether it requires jailbreaking your device, but I think so. Since you probably updated to iOS 5.1 you will have to do with a tethered jailbreak.