See price list. 

If you change the tariff, you do not have to pay the connection fee of EUR 69.99. 

Thank you!

I am ok with the tariff, how can I ask for tariff change?

Regards,

Venkat

You can contact customer service or you wait here for 7 to 14 days until the first answer of o2 staff.

https://www.o2online.de/kontakt/whatsapp-chat/

Hi @agvs 

Welcome to our o2 Community.

We love to assist you regarding your DSL Tariff upgrade. 

But first things first :-)

My system shows me you got an other mobile contract on a second customer account number. 

We can merge these two contracts and merge them on one customer account number.

The advantage is only one login for our o2online Selfcare website and you only receive one monthly invoice and

a transaction with a bank account that makes it much clearer for you to keep track of every bank account movement.

Sounds good, doesn’t it?  So if you are fine with it we would start with the merge, before were upgrade your DSL tariff.

Best regards.

Matze