URL: https://v1.desy.de/services/telecommunication/service_support/index_eng.html
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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.
