i have a iphone and im looking at the 15 dollar per month prepaid service from t mobile wich includes unlimited txts and minutes at $0.10 im wondering if i buy it i have to play a extra 10 cents for the minutes right? so total its going to be like 20 bucks a month so im wondering if i can buy minute cards for this plan? also do you know of any other prepaid service that offers unlimited txts and comes with a sim card?