This may be a random question and the answer may be out there but I know that in order to upgrade one must pay off 50% of their phone. However, what if I want to cancel my Verizon plan and not keep my phone? I know I may have paid money into the phone and not get it back but if I want to swap to another carrier then my phone won't work for it. So is it possible to pay up to the 50% and return the phone with no upgrade?