Instructions
Downgrading Baseband
1
Open the Cydia app on the iPhone and go to manage. Tap on "Sources," then "Edit," in the upper right hand corner of the screen. Tap on "Add" in the upper left hand corner of the screen.
2
In the dialog box requesting you to enter a source, type: "http//apt.steffwiz.com/" and tap "Add Source."
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3
Tap on search, then type "fuzzyband" in the search field. Tap Fuzzyband, then tap again on the upper right hand corner to install the application.
4
After installation, press the home button to return to the springboard. Open your new Fuzzyband application and let it run.
5
When Fuzzyband finishes, tap the downgrade button.
6
Use Ultrasn0w to unlock your phone.
Read more: How to Downgrade iPhone Baseband | eHow.com How to Downgrade iPhone Baseband | eHow.com