ok so i have a family plan with my mom and we have a certain amount of minutes (i cant remember how many) but i have texting and she doesnt. i have a $15 plan with unlimited to verizon and 1500 to non verizon people. i want to get unlimited texting but do i have to pay $30 for my mom and i, or can i pay the $20 for unlimited even though the $20 is for a single plan.