Beste antwoord door Roytje87
Welkom here! :)
You can present your phone to T-Mobile in order to get it repaired.
You can do so by visiting a T-Shop or calling Customer Support (1200 on your mobile phone or 0624001200 from any other phone). Please make sure to have your IMEI-nr. (dial *#06# on your phone) and your delivery receipt with you/at your side.