Hello @Adriana75 

Hello @Bollermann 

Thank you very much for your answer and the information. 

Regards

If you have access to your “mein o2” account, you can just order a replacement card for your lost card. If your old card was stolen, you should lock it first 

Dear @Adriana75 ,

welcome to our community.

Have you already been able to get help on the english hotline or can we help you further?
Has your phone been stolen and do you want to block the SIM card or do you just need a new SIM card?

Thanks to @Bollermann and @salov for your support.

Kind regards,

Andrea