Hello @YehudaE_1955699 . first thing to do is look at https://smarty.co.uk/network-status-checker to see if there are any mast issues in the area.
I have just had someone visit who said that O2 have had massive outages today nationally, so perhaps there are issues generally with mobile signals.
If you get no joy, contact the Support Team via web chat. We forum members don't have any special access to info unfortunately.
