You have a problem with your router/internet connection? Please check the LED lights first.

If you use an O2 Homebox it is named “DSL LED” and by a Fritz box “Power LED” (DSL oder cable version):

• If the light is flashing there is no (V)DSL or cable synchronization at your line

Did you check the wire from the router to the TAE box or multi media box? Is everything fixed?

Did you restart the router after the router has been unplugged from electricity for at least 10 minutes?

If so and nothing happens after all then a (V)DSL or cable error ticket must be created by the O2 helpline.

Please use the “o2 my Service”

for Android click here: Google Play Store 

for iOS click here: Apple App Store 
After you installed the app on your mobile, you can switch the language from German to English via Menu/Einstellungen/Sprache

The app can check your (V)DSL or cable connection while the app is running and your phone is connected to the Wifi of your router. If a fault is detected you get a pre-ticket number and a phone number to issue an error ticket. Please have your landline number and the four-digit customer identification code at hand. Remember that O2 can´t guarantee an English speaking support staff. If it is necessary, try calling again or ask a German friend for assistance.


If you don’t use the app please get in touch with our technical customer support.
Call for German: 089787979400 (at fixed landline price).

Call for English: 089666630081  (at fixed landline price)

Example of the “o2 my Service” App (Android:

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If you have further question or any comment about this topic and process you can visit our English o2 community and write a question! 

Last Update: 02/2022