Each Premier Group receives different benefits based on their contract with AT&T.
There are no discounts on the purchase of the iPhone 3G or 3GS. For example: Some customers receive disounts on all devices purchased (except the iPhone), discounts on voice and data plans while other's groups only receive a discount on the voice plan.
FamilyTalk rate plans only receive the voice discount on the primary line. Some groups also receive discounts on data plans on all lines on the FamilyTalk plan, again it varies by group.