Does anyone have a guide or a walk-through to making sure AT&T doesn't trick me into a tiered plan if I pre-order the phone through the Apple site? I've googled a million blogs on it and none of them tell you how to do it through the website. Most say you should go in person. But what if you can't (Due to time and distance constraints)? Surely there must be a way to make sure you don't click the wrong button and end up with a bucket-o-data.