A MetroPCS employee adjusts a pair of vision goggles on a customer's face who's questioning whether his eyesight is all right. The employee asks the customer what he sees. He sees a sign advertising a deal for unlimited data, talk and text on the 4G LTE T-Mobile network for just $30 a month. And, he's not just imagining it! Is his vision 20/20? Well, more like 30. Period.