Service Support Center

Contact our Service Support Center for all questions about CAx Supplier Network (CSN), European Network Exchange (ENX), Trainings and Information Security.

operational services GmbH & Co. KG

Rudolf-Ehrlich-Str. 7
D-08058 Zwickau

+49 375 6061 9904 (international)
0800 5 877 877 (only in Germany)
Fax: +49 391 580 130 760

For Czech and Slovakian language support please contact:
T-Mobile Czech Republic a.s.
+420 739 242 027
email: and


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