I change my current phone to an android phone? I have a regular phone right now from boost mobile And I'm thinking of buying the samsung prevail from them too. I started paying $50, now m paying $40 from the shrinkage. If I change my regular phone to the prevail android phone, I believe the prevail will work with the $50 monthly plan, will I continue to pay $40 a month or bak to $50 again?