T-Mobile is faced with a failure on Wednesday, as a result of which an unknown number of customers cannot use the fixed internet.
The provider confirms the malfunction on its website.
"We are receiving reports that a number of customers are experiencing problems with the fixed internet on our fiber optic network. At the moment we are looking for the cause and the solution," writes T-Mobile.
According to the provider, the outage occurred in the course of the morning.
Due to the problems, customer service is also difficult to reach by telephone.
The cause of the malfunction is unknown.
A spokesperson for T-Mobile was not available for a response.