My Samsung s9 is showing a grey triangle with a white exclamationmark with MM at the bottom of it.

[Android Central Question]

My S9 is showing a grey triangle with a white exclamation mark and MM at the bottom.

I can't phone or sms or do anything accept if I'm on wifi.

Please help

 

[belodion]

Take it to your nearest carrier store, or at least call them and explain.