I have 3G iPhone. I closed my contract with AT&T 4 months back. It has 2.2 version firmware. I really would like to "unlock" so that I can use any SIM card if I travel international for GSM network. I tried PwnageTool yesterday but not successful. It says "not able to get to DFW mode". I have following questions? 1. Can we unlock 2.2 firmware iPhone 3G phones? 2. If I have to only unlock SIM, what should I use? Is it PwnageTool or QuickPwn? 3. When I trying PwnageTool, while I was asked to power on or hold home button on iPhone, I see that iTunes is getting connected to iPhone while I am using PwnageTool. Will that create a problem and is that why I see that error? I really appreciate if you can give some suggestions.. All I would like to do is to unlock the phone. I thought it is easy but some how i am not successful. Thanks.