Officemax has a good deal on the Treo 650 (cdma) for Earthlink. Eathlink uses Sprint for it cell infrastructures. My am currently a Sprint (Treo 300) user and could upgrade to the Treo 650 for less than any place else I have found. What I am wondering is if this this phone could be locked to only work with a Eathlink contract and not work with a Sprint contract? If so can it be unlock?