Poor
Wrong Language
Response from developer
Hi! It is indeed true that the app is only available in English and in Dutch. We might add more language options in the future, but at the moment this is not yet an option. If you would like to know more about the T-Mobile app, you can always reach us on Facebook or Twitter. Greetings, Johrick
Data use is never correct
Response from developer
Hi. You can track your data through most phones nowadays. We can't see where exactly the data is going. There might be apps in the background that use more data than you expect! If we can help you with anything, please send us a message via Facebook or Twitter. ^Johrick