I remember seeing this unlock tool or something like that on installer.app entitled "T-Zone hacK" or something like that. Anyways now that I've decided I'm going to sign up for T-zones, I can't seem to find this tool for installation on installer.app. Where is it? T-zones works on 1.1.1 right? I've only been able to find a guide for T-Zones on 1.0.2. Will T-Zones work on a pre-paid sim card from T-Mobile?