We are looking to get a pre paid cell phone for our 10 year old son. He rides his bike to school and today his bike broke down en route so he was lucky his friend had a cell phone to call me. I want my son to carry it with him for emergency's such as that. Anyway, does anyone know of a pre paid that minutes will not expire? I checked out a go phone but the minutes you buy need to be renewed every 30, 60 or 90 days? Or I can put $100 on for a year. I want to just add $10 and have that until it's gone and then we will add more as needed. Is there a prepaid company that will allow that?