Why can't I activate my iPhone 3GS
I've tried several techniques to recover/format my iPhone 3GS, but it just isn't working. The phone keeps popping up with a message saying, "Could not activate iPhone, try connecting your iPhone to iTunes to activate it." When the iPhone is connected to iTunes, it reads the phone and asks for a SIM card, but doesn't read the SIM cards.
I've also tried a lot of software updates and resetting the iPhone itself, but it keeps failing on me and doesn't allow me to proceed to anything else.