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What would you like to increase in iPhone 6 (iPhone Air)?
These are instructions on how to unlock the iPhone 4, iPhone 3GS, and iPhone 3G for use with any GSM cellphone carrier using UltraSn0w 1.2.3 version.
Incompatible basebands :
HOW TO UNLOCK 4.3 for iPHONE 4, iPHONE 3GS / iPHONE 3G:
Before you can follow these instructions you must have a jailbroken iPhone:
— iPhone 4(Guide about Jailbreak 4.3)
— iPhone 3GS(Guide about Jailbreak 4.3).
Press to launch Cydia Installer from your SpringBoard.
Press the Install button at the top right of the screen.
Now press the Home button then power off and power on the iPhone. You do this by holding down the power button for 3 seconds then moving the power slider that appears to the right. Press the power button again to turn on the phone.
You should now be able to insert the SIM of your choice!
***THANKS: A big thank you to all the members of the iPhone Dev-Team for all their hard work! It is much appreciated by all.