Unlocking the iphone is pretty easy using Ultrasn0w. Do your firmware update to 3.0 and jailbreak as mentioned in this tutorial. After that, follow these steps:
- First thing first, if you are unlocking for T-Mobile USA, make sure to disable 3G.
- Run Cydia
- Select Manage > Sources > Edit > Add and type repo666.ultrasn0w.com in. The “0″ in snow is actually a number, “zero”
- Wait for the sources to be refreshed
- Search “ultrasn0w” and install it
- Reboot
- Enjoy your freshly unlocked iPhone 3G
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Filed under: iPhone 3.0, Jailbreak 3.0, Unlocking 3.0