I just bought an iPhone 4, and it got shipped to my house...The dude claims that is was already jailbroken. But when I turned on the phone, it says No SIM card installed. My intent was to resell this jailbroken iPhone, and I have no idea what to do now. I don't have a sim card of my own to active the iphone either. I just waited a few hundred dollars down the drain and have no idea how to even get started. How can I get myself to figure out what firmware this is? or what can i do to bypass this "NO SIMCARD INSTALLED SCREEN"? Much help would be greatly appreciated :/