iFuntastic

Funtastic strives to be your one-stop application to customize your phone's look and functionality.
However, since you can't do very much (but some!) to a shackled phone, a necessary evil has been the unshackling.

iFuntastic provides several ways to unshackle the phone as well as utility functions to restart the phone, download firmware files etc.
A wizard guides you step by step through this unfortunately very lengthy and error prone procedure.