An anonymous reader writes: Five years after AT&T discontinued its unlimited mobile data plan, the company is bringing it back with a catch: users must be subscribed to DirecTV or U-verse TV as well. The service will start at $100/month for a single subscriber. Two additional users can be added for $40/month each, and the fourth is free. There's also one more caveat: "Customers that exceed 22 gigabytes of data use in one month will have their speed throttled during peak network traffic periods." AT&T looks to do battle with T-Mobile, who has a similar four-person plan. This is one of the first major consequences of AT&T's acquisition of DirecTV last year for $48.5 billion. The company says it will soon roll out other plans to combine the services.