Hi , I can’t log in to the mein o2 app displays an error “Ein allgemeiner Fehler ist aufgetreten. Bitte versuchen Sie es später noch einmal. (-1)”
I am registered via email , I have already been spun by dsl
o2_Antje: Moved to Englisch Community / 15.02.2023
Hello
welcome to our o2 Community 
Did you use the same login for the app with which you are now logged in here in the forum?
Please log in to the Mein o2 app with your mobile or landline phone number only.
If you have not already done so, you must first register here with your phone number: Bei o2 Registrieren und Vorteile nutzen: Jetzt anmelden (o2online.de)
Please let us know if you have any further questions.
Best regards
Giulia
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