To this point Ive had no interest in unlocking or jailbraking or anything. However, it seems ziphone is some kind of miracle app that can unlock with a few clicks. Trust me, Ive read and read and read about this but I dont know if I should even try. The more I read the more confused I get. I have a 4gb iphone, no clue about bootloaders or whatever. Seems you need to know which one you have before you do anything. And everyone talks about what v.firmware you have OTB. I dont know, I dont remember. I *think* it was 1.0.2?? Im currently running 1.1.3. Here is what I want to do: I want to be able to use my phone with Tmobile. I already have a Tmo account, so I have the sim card right here. What all do I need to do in ziphone? Just tick "unlock" and thats it?? And does unlocking within ziphone void the warranty at all? Is it possible to re-lock? If my phone suddenly dies and I take it to get replaced they arent going to wag a finger in my face and say "naughty boy, its unlocked, you are stuck." Thats probably my biggest concern. Can you totally put everything back the way it was within ziphone? Some hold my hand and walk me through how to use ziphone to be able to get on with Tmobile. Thanks. edit - I should mention that my iphone is currently being used on an ATT gophone plan, so its already activated.