Hi @PePle , i am glad to welcome you in our community. 
Just for understanding reasons, you are registered as an o2 My Handy customer and your contact phone number has changed to an german number in your customer data? 
Is this right? 

kindly regards
Michael

Hello Michael, 

Yes, I registerd in Mein O2 and now I have german prefix +49 in my contact number. 

Thanks

Hi @o2_Micha, 

can you change the number, so I have +420 so you can reach me? 

Thank you

Hi @PePle i sent you a private message, because i need some data for legitimation reasons. 
The message was sent from our o2support account.

kindly regards
Michael

Hi @PePle thanks for the conversation via private messaging 
I switched the prefix number to the czech one as you wish. 
If you´ve any further request, you´re allways welcome. 

kindly regards.
Michael

Hi @o2_Micha,

Thank you.

When will I see the change? I still see +49 in “meine daten” and in “mein bestellungen” in the offer. 

Thank you,

Petra

Thanks for your respond @PePle ,
the change will be seen in all the further communications. 
In the old dialog it won´t be changed. But this is not really important, because the right number is saved and when some departement needs the personal contact, they will hab´ve the right number. 

lg
Michael