My phone has ceased to work. I have received an error message about my SIM

[Chaplin1]

This morning my phone has ceased to work. I cannot make outgoing calls. I received an error message about my SIM.

What is the problem please

[Mod edit: removed mobile number]

[Linzi_H]

Hi @Chaplin1 

Welcome to the Community. 

What error message are you seeing about your SIM?
Are you a Pay Monthly or Pay As You Go customer with us? 

Speak soon,
Linzi