All unlocking hacks for iPhone successfully fail with the 1.1.3 firmware update. Even hardware-based TurboSIM is totally useless. This is quite a problem for unofficially unlocked iPhone users.
Another major problem is that no downgrade is available from 1.1.3. In plain English this means that unless hackers find a solution, after applying the 1.1.3 update, your iPhone will become totally useless.