Hello @stef67 ,

welcome to our community.

Wich device are you using?

Can you send me more informations, please?

Best wishes - Micha

iphone xs max. but i try the sim in one iphone 5 and in samsung galaxy s8. the same problem

Is it the only SIM for your contract? Or is it a Multicard?

If you are using multicards for your mobile-number, you can only receive sms with one sim.

You can try this:

Tip once *125# in the phone app and confirm with call.

I hope these tips could help you?

Die Änderungen können nur noch über Mein o2 vorgenommen werden und nicht mehr mit USSD-Codes.

Hello @stef67 and welcome to our community :-)

Was the tipp from @TBCMagic helpful to configure your multicards with the Mein o2 app on your mobile?

Regards,

Lars