So my family is pretty deep into t-mobile. My phone is ready for an upgrade. The only phones that would considered an "upgrade" would be a smartphone. My dad is hesitant because of the data plan that comes along with it. I tried looking on their website and couldn't find how much it is to upgrade to a basic data plan. My dad said that it would be like 20-40$ more a month PER phone. Is that true? I was hoping that it either add that much for a whole family plan