AT&T's Grandfathered Unlimited Data Plan Customers Get 5GB on LTE Before Being Throttled
Additionally, unlike Verizon, which is no longer offering unlimited data customers discounted pricing on new handsets -- even with a new, two-year contract -- AT&T will honor its subsidized pricing policies even for its customers with unlimited data plans.
However, AT&T customers who aren't using the company's new Mobile Share plans will not be able to use FaceTime over Cellular.
AT&T customers who are eligible for an upgrade can order an iPhone 5 16GB for $199 beginning on Friday through the Apple Online Store or att.com/iphone. Users can see if they're eligible for an upgrade by checking AT&T's upgrade eligibility checker.