Hey Guys, I am traveling outside the country (to Asia) for work and I would like to use my old AT&T iPhone 3G with the local GSM carrier. Can someone guide me as to how to unlock my phone. I dont have Cydia on my phone as well. My phone details are as follows: Version: 3.1.3(7E18) Carrier: AT&T 5.6 Modem Firmware 05.13.04 Let me know if you need more info on the phone. Thanks and really appreciate the help.