I've just updated my iPhone 3G to the 3.0 software and it won't recognize my SIM card.
It says 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 SIM card that came with your iPhone or visit a supported store to receive a replacement SIM card.
Now when I plug in my iPhone, the only thing on its screen is the iTunes logo and the USB, indicating I should connect my iPhone to iTunes, and the slider for emergency calls. When I do plug it in, I get the message above.
My iPhone worked fine before I updated, I had no PIN lock on it, so it worked fine with my carrier. What can I do?
Many thanks in advance.