Hello,
I have three SIM cards associated with my account. I would like to delete two of them but I can not see an option to do this anywhere on the site.
I could not find any email address to contact someone either.
thanks,
Fraser
Edit o2_Larissa: moved to English o2 Community: Mobile
Hello
thank you for your question and welcome to our o2 community! 
You can easily deactivate a SIM card in your My o2 portal.
To do this, log in with your number and password and go to "Tariff & SIM card". There you will find all your active SIM cards that belong to the corresponding number and you can also deactivate them there.
Information about Mein o2 you find here:
If anything should cause problems, please come back to us here.
Kind regards
Jessica
P.S.: If you need any further information you can also check our English FAQ page which you can find here:
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
