However you are and for however reason you ended up here, take a advice:

Do not get cable internet from O2 - in special if you moved in recently and don't speak well German.

I 've moved some time ago to Germany with very limited German skills since my work is carried in English. 

I was moved to home office recently due to pandemic  and decided to contract O2 for cable internet. S ince my mobile was from them as well, I thougth I would be valued as costumer. Worst idea ever.

My internet was supposed to be activated and working since 21st of April. Not only is not working as I can not even communicated to the technical department of O 2 that is not working. I have been in an ongoing inferno for almost a month now. I reported several times that I was without internet  in the course of almost ONE unbelievable  month. Every single time I'm transferred to the techinical department that some know English but pretend they don't . 

At the same time, O2 debited from my bank account all the dues. Meaning, I'm paying for a service that I never ever had. It is unbelievable! Looking careful, you can see as well other people complaining the same.

On top of that, I almost lost my job since I rely on the internet now due to pandemic. I had to force my way back to the office. 

So take a advice, look for another internet provider!

Edit o2_Lars: Moved from DSL/Router to English/Broadband