This is probably pretty obvious, but just in case there is anyone out there that thinks they can keep the BT headset that they got from P1 and return just the 650.

Note this paragraph:

"If the item you are returning was accompanied by a free or discounted promotional item at the time of purchase, you must also return the free or discounted promotional item. Failure to do so will result in the deduction of the full retail value of the missing item from any credit issued, as well as a restocking fee of 25% on the total order."

If you get your phone from Sprint and decide to keep your P1 order, just realize that you will have to send back the BT heaset with the 650 to be able to get a refund from P1.