Hey @master-of-disaster2,
First of all - you have the freedom to decide which contract you want to continue and conclude. Nobody can force you to do so. 
Of course, fibre optics is an interesting product. You would have to find out for yourself whether you are interested. However, if you are happy with your DSL contract, you can of course continue with it. 
You could also talk to your landlord or property manager to see if a fibre optic connection has already been installed. 
I hope I've been able to help you a little. If you have any more questions, just let me know. Perhaps our community expert has a few more tips? @Joe Doe 

Greetings,
Flo

@o2_Flo just wanted to be sure that it is nothing what I should be forced into. I assume if such change will be forced - I will get information from O2 and not from other internet provider. 

The DSL have some pros against the fibre optic connection, as I have also for private the fiber optic connection at different location, and really I do not want to change. Therefore I wanted to ask at the source . Nevertheless I will ask at owners meeting in 2 weeks about the case too

Thank you

Hello @master-of-disaster2,

If you are pressured to make such contractual changes at the front door, you should always close the door straight away. This is extremely dubious and, as you have described it, certainly not allowed without your consent .

I'm glad you were suspicious and didn't act on it and will continue to be our customer.

Have a nice weekend

Best regards

Giulia

Hey @master-of-disaster2,
if we can still help you or you want to share your story with us further, go ahead We are always here to help! 

Greetings,
Flo

all good, they were again at my doors last week …. topic can be closed thx

Thank you for your feedback @master-of-disaster2.

If you like, you can also mark your answer as the "best answer" here.

If there's anything else, please don't hesitate to let us know.

Kind regards

Steffen