Just a quick question. I'm already with AT&T. I'm thinking about buying an iPhone. If I go buy one at the Apple Store, and jailbreak & activate it through ZiPhone, I should be good right? I DO NOT want to extend my contract another 2 years. Or would I have to unlock it? I'd prefer not to simply to keep the warranty. I've been researching this, I'm just looking for a definitive answer. Thanks to anyone that can answer me this quick question.