im on a secondary line of a family plan which has 450 minutes a month. none of us use the minutes too much. anyway, I have an iphone 2g and still only get charge the standard 9.99 for the second line. I also talked to an ATT rep the other day who said when i upgrade to a 3GS, that wont change, just the data plan. If you have an existing family plan and your primary line isnt an iphone then i think you retain a standard minutes plan.