Emergency calls only - Galaxy S23 ultra

[Beesechurger]

Hi all I've had this phone since the start of November and it was working fine.

For the last 2 days it has been saying "emergency calls only " and on a few occasions it has said "sim not registered on network "

I have checked the service status for my area and there's no known issues. 

I have tried restarting the phone, resetting network settings, removing the sim and cleaning it, toggling airplane mode, basically all the advice given elsewhere on these forums. 

Is there anything else I should try before spending 9000 hours on hold with sky customer services?

Many thanks 

[caesarome]

@Beesechurger 

You could order yourself a replacement sim in case the one you have has developed a fault:

https://www.sky.com/help/articles/replacement-sim