You can’t add it to your contract but you can buy a new phone as a separate contract.

How long ago did you extend your mobile contract? If it is witrhin the last 14 days you could cancel and then extend it again. If you buy a phone at the same time a hardware discount might be possible.

Hi @Alexandra Martin, 

I welcome you to our English Community. 

Thanks for your request. I am happy that you already have extended your contract for 24 months with a nice discount. 

@bs0 already has given you the correct suggestions about your possibilities. 

In your case, I suggest to you that you just order a mobile phone device additionally. It does not make much sense for you to cancel your existing extension as you have already an attractive discount. 

Please choose your device here: Devices available 

If you need any further help, just let us know. 

Loving greetings,

Tobias