T-Mobile Family AllowancesSM is an online/web-based tool that let's you determine how many minutes, messages, and downloads each family member gets. If they reach their limit, you're automatically notified and their service is temporarily disabled (but don't worry - you can still designate Always Allowed^SM numbers, so no matter what, you can still get through). And you can dial their allowances up or down at any time online.

You can even make sure your kids aren't distracted by texts during English class or talking on the phone all night by setting their devices so they won't ring during certain hours of the day.

So your kids are psyched because they have a phone and you can relax knowing they're learning to use it responsibly. Win, win!