Yes I have but still no joy. Thanks for your suggestion!

Hi I stupidly downloaded pwnage from a paid site that claimed it could jailbreak and unlock my G3 iphone running 2.2.1. As I have read above this does not currently work and now my iphone recognizes my sim but does not hold a signal for any Carrier. As I am obviously a newbie and should have looked into the claims of the site further I now realize that I paid for the privilege of damaging my new iphone d'oh! Can anyone advise me how to , if it is at all possible, fix this issue??? Did I say STUPID?