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I would like to change my main phone number, but when I'm trying to open "Meine Daten" or any other pages from "Mein O2 Übersicht" column it alway redirects me to https://hilfe.o2online.de/ and does nothing.
use the app for mobile devices from apple store or googe store
Try to login with your phone number and not with your email address / user name.
It doesn't work, it offers me to prove the phone number which I don't have access to anymore. The same as on the web versions of this website.
Is the current mobile number registered with My o2?



What do you want to do exactly?
Solved it by logging in using "Rufnummer" instead of useraname or email.

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