Activating 1Gen 2G iPhone after Qpwn 2.1

[Diver]

I just got a 1st Gen 2G iphone and ran Quickpwn 2.1.1. Everything worked well and it jailbroke the phone and installed cydia. Unfortunately, the phone is still locked and when I put in a sim card it says, "Different sim detected please connect to iTunes." How do I actually unlock / activate my phone so that I can use any sim card?
Thanks,
Diver