I know you are required to have a data plan for a smart phone. But does that only apply to those on 2 year contracts? I have an old D2 that my wife wants to use. She currently uses a dumb phone. She doesn't want a data plan, doesn't want the smart phone features. She just wants to use it for calling & texting. Is there any way at all that can happen? Or does any smart phone, even older ones or unlocked ones, need a data plan? Thanks.