Hello @Dansoa,

https://info.o2online.de/kuendigung/

Best regards

Hello @Dansoa 

welcome to the o2 Community .

While we here will gladly help you with just about anything concerning your o2 contract, we can’t accept any cancellations here. For that please use the link that Vilureef provided or if you prefer you can of course also still send in your request by post. Should you have any further questions about this, please let us know.

Kind regards, Sven