my mom & i have about a month left on our t-mobile contract. we're going to switch to verizon after the contract is over. if my mom gets a simple feature phone w/ only minute usage & i get a smartphone w/ the thirty dollar data plan & unlimited texting, how much would our monthly bill come out to be ? also, how much would it be if i were to switch the smartphone w/ a multimedia phone w/ the ten dollar data plan & unlimited texting ? [: