T-Mobile's T-Life app has faced significant criticism from employees and customers since its launch, despite updates aimed at improving functionality. Users report challenges with the app, including unclear and impractical functions. One user experienced difficulty after accidentally deleting their eSIM, as the app did not provide a solution and required a visit to a physical store for assistance. T-Mobile has encouraged customers to use the app for self-service tasks, but reports indicate that employees must report instances when customers refuse to use it. The transition to the app has created friction and raised questions about its effectiveness.