Service/support

 

Blocking your card


To block your card, please call Telekom at +49 (0) 800 330034560. The card can be blocked immediately here.

During working hours you can also contact us at the extension -2428/-3266 or mobiltelefonie@desy.de. Then we will block the card for you.

A replacement card can be issued at any time via V1.

To enable us to issue a new SIM card  to you as soon as possible, please send a short message to mobiltelefonie@desy.de if you lose your SIM card. 

Keyboard codes for activating/deactivating services

application/pdf GSM Codes (63KB)
GSM Codes