So i went through all the unlocking steps and it appeared to go fine, when it was finished it asked me to insert a sim card which I did. So I put in the sim and unlock and it said it was successful. The iphone screen then gives me the usb symbol with the itunes logo telling me to plug in so I do. Then I get this message.. The Sim card inserted in this iPhone does not appear to be supported. Only compatible sim cards from a supported carrier may be used to activate iPhone. Please insert the iPhone that came with your iPhone or visit a supported Carriers store to receive a replacement sim card. Any help please..