Hi!
You must use the Mein o2 App. In Mein o2 (Webpage) the option doesn`t exists.
Start the Mein o2 App and then tab Menü in the bottom rigth corner. Now select “Tarif & Optinen”. On the next page you will see “Rufnummernmitname”. On the next page you can release your phone number by taping the button on the bottom.(Rufnummer jetzt freigeben)
The release will be confimed by SMS and/or EMail. Now you can port your number to your new provider.
Hello @sandeepch,
and thank you very much @tearsbeforecrying for your answer and help
Just let us know if everything worked for you @sandeepch!
Kind regards
Jessica