T-Mobile has announced the T-Mobile Network Test Drive app. The app allows iPhone owners with eSIM to test out the company's network with their existing device. T-Mobile is utilizing eSIM technology to entice users to join its network. As reported by Light Reading, the company has posted a new support document on its website announcing a new iOS app called T-Mobile Network Test Drive. The new app allows users with an eSIM-capable iPhone to test out their network with their existing phone. T-Mobile says that the iPhone must be unlocked and that users who sign up for the program will get 30 days or 30GB of high-speed data.