Also a word of caution to those AT&T Unlimited Data holders...
http://gizmodo.com/5943061/how-to-buy-an-iphone-5-without-losing-your-unlimited-data-plan
Taken from article:
So the iPhone 5 is coming out. Its LTE data speeds mean you'll stand a much better chance of blowing past your data caps, which in turn means those grandfathered Verizon and AT&T unlimited data plans are more precious than ever. Here's how to make sure you don't lose yours. Don't Order Online
One note before you run off and pre-order tomorrow: Don't. AT&T and Verizon are both notorious for having opaque online tools for carrying over grandfathered plans. That's a bad thing, since if you accidentally ditch your plan, you probably won't get it back. Reps at both stores said that you've really got to be careful, since recovering your unlimited plan is pretty much a lost cause—not totally impossible, just effectively so.
The real benefit of in-store is being able to stop and ask, "Now, you're sure this isn't going to mess with my unlimited plan, right?" You're just sort of left to your own devices online.
Don't Add Anything to Your Plan
Adding anything to your plan, like sharing bandwidth between devices or hotspot capability, will void your unlimited and dump you into a shared, tired plan. So don't splurge on, say, sharing your new iPhone's plan with your tablet's, since that will stick you in a new, limited package. Sorry, you're stuck with the basic data plan if you want to keep unlimited.
The good part, for now at least, is that the bump up to LTE does not trigger this.
For AT&T
AT&T is in a strange place right now: Like Verizon, it's trying to push its users into shared data plans. You can sign a new "unlimited" contract, but AT&T's now throttling its unlimited customers after 5GB—seemingly down from the old estimated soft caps around 6GB.
I spoke with AT&T store representatives, who explained the process for porting over your iPhone along with an unlimited plan has always been kind of a hassle. The stores just sort of figure it out with trial and error. None of them had seen how the system handles the iPhone 5, but they figured it wouldn't be a problem to port those plans over. So we were told a few weeks after the iPhone 5 comes out, dropping by an AT&T store should be all you need to do to keep your plan.
