What we Need :
1- universal sim
2- Iphone os 3 from here
3- i-tunes 8.1 latest version from here
Way to unlock :
1- Connect phone to i-tunes in recovery and make restore firmware 3
2- Wait untel phone successfully updated now the base band is updated to 04.20.01
3- Connect phone to i-tunes again but this time in DFU mode in order to downgrade to firmware 2.2
4- Now connect phone to QuickPwn-225-2 and make jailbreak and follow those steps
5- Now go to setting - General - Network and make this option :
Enable 3G : OFF
Data Roamin : ON
6- Now inset your sim card with universal sim and restart your i-phone
Enjoy your unlocked I-Phone
Br
gsmlocker