i have both a 3g iphone and a 2g iphone. The 3g iphone has a cracked screen and i'm going to send it in the mail to be repaired, which will probably take a few weeks. The 2g isn't activated right now and i was wondering if there is an easy way to get it working with the sim card in my 3g phone without having to connect to itunes and activate it on my at&t account... jailbreak?