Those with high bills based on text messaging can finally relax. Effective September 4, parents will be able to purchase AT&T Smart Limits, giving them the ability to regulate their children’s voice and data usage. The tool will allow individuals to set usage limits, allocate minutes (finally) among various users on the family plan, set various time-of-day or day-of-week stipulations, filter content, and allow for specified calling. The service will cost $4.99 monthly and is not available on corporate accounts. Looks like Grandma is going to have to cut back her call time.