Hi,
I was trying to transfer my phone number to another mobile carrier. I attempted to use the Rufnummernmitnahme feature in the Mein O2 app, but at the final stage, it shows the wrong date of birth (interestingly, it's only off by one day). However, the correct date of birth is listed in the Mein O2 portal and all my documents. Is there an issue with the app, or has my data somehow been corrupted?