When you go into the store, they will want to upgrade that dumb phone line to the data plan line, then you can get that phone for the price, then, on your own, you should be able to swap phones, reactivate the dumb phone on that line to get rid of the data package, and do what you want with the older smart phone. The dumb phone line though will be extended for another 2 years however. This should work if I'm not mistaken, but in order to get the upgrade price, you HAVE to activate that phone on a line regardless. Otherwise you have to buy the phone outright.