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.