One of the rather more useful jailbreak tools has been Fuzzyband, the Cydia application that has been used frequently to downgrade an iPhone or iPod Touch’s baseband to an unlockable version instead of the latest one. Good news is, this application has been upgraded to support a very specific group; iPhone 3G users with the latest OS 4.0 baseband 05.13.03 but the rare old bootloader, 05.08. Yep, Fuzzyband mow supports iPhone OS 4.0 beta’s new baseband!
Since jailbreak of the iPhone OS 4.0 beta has already been exhibited by many respectable names, the main issue was now unlock. If your iPhone meets the criteria we established above, consider yourself lucky!. Using Fuzzyband you can downgrade the baseband from 05.13.03 to older 04.26.08.
After downgrade, ultrasn0w can do the unlock for you.
Here’s a tour of how you can downgrade baseband on latest iPhone OS 4.0 using Fuzzyband.
1. On your already-jailbroken iPhone 3G, go to Cydia and search for the Fuzzyband application. Download and install.
2 Start Fuzzyband and touch the ‘downgrade’ button to recall the old firmware version, i.e., 04.26.08.
3. That’s it! With the baseband back to a version recognized by ultrasn0w, grab the latest version of the tool (0.9.5) and have an unlocked iPhone 3G running OS 4.0 beta and working great!
Let us know how this worked for you.