From The Apple Wiki

f0recast is an application created by iH8sn0w. He created a simple application to tap into MobileDevice Library inside of: C:\Program Files\Common Files\Apple\Mobile Device Support\bin\iTunesMobileDevice.dll

It grabs these functions when an iDevice is connected:

How does it determine if its unlockable?[edit]

When f0recast grabs the baseband version, it checks the version against a built-in database to determine whether it is unlockable or not.

How does it determine if it's restricted to a tethered jailbreak?[edit]

f0recast checks the built-in database of firmwares which are tethered and untethered.




Download f0recast