Unlock modem from 04.26.08 to 05.13.04 for iphone 3G, 3GS, 4 using Ultrasn0w
Add repo666.ultrasn0w.com to Cydia repository , then run ultrasn0w 0.93 and call where we want.
For clarity - instructions with pictures
1. Connect the WiFi network.
2. Run Cydia and add a surs: repo666.ultrasn0w.com
3. Then install ultrasn0w
4. Wait until the installation is complete ...
5. Restart your phone when the program prompts you to do this.
Now your phone is unlocked and can work with a SIM-card of any operator.