There is new service that just came out called Airtime Freedom from Got Minutes Inc. It alerts you through text message and email if anyone in your family share plan goes over their minutes. It has all sorts of cool features and it’s very inexpensive. Its $2.99 per month for the first user and $1.00 more for each additional user up to five users that you want to monitor on one family share plan. If you want to make sure you don’t go over your minutes and end up with a huge bill at the end of the month you should go check them out at gotminutes.com Its free to try out for 30 days and you don’t have to give them any credit card info to try it out.