I also agree. The MSRP on the 8GB iPhone 3G is $499 and the 3GS is $599 and $699 respectively. Im sure AT&T is not paying Apple much less if any than these retail prices, so when they sell them for $99, $199, and $299 under contract they are selling the device at a $400 loss and recouping the loss over 24 months. Why wouldn't they increase their ETF on more expensive devices to keep the ETF more in line with their loss on the device. The cheap phones they sell have also gotten cheaper over the years so AT&T is reducing the ETF on these phones also to reflect smaller losses on those devices.