The frontend subsidy rate isn't the same, at least according to AT&T's stated online prices. The price difference for any on-contract vs off-contract iPhone is

The frontend subsidy rate isn't the same, at least according to AT&T's stated online prices. The price difference for any on-contract vs off-contract iPhone is $450. I couldn't find another new phone (Android, Windows Phone, Blackberry, ...) with a on-contract vs off-contract price difference of over $400. Most were $350 or less.