Phone saying no sim

[Christinawalsh6]

Can not make or receive phone calls 

[pgn]

Remove and reinsert the SIM card, after wiping it carefully with a lint-free cloth@Christinawalsh6 - Guide: How can I sort out my network issues? 

Otherwise a trip into an O2 shop with valid photo id for them to change the SIM card (don't be pushed into accepting an eSIM either, fraught with difficulties on O2.).

[MI5]

@Christinawalsh6 

Guide: Is the network down for me or everyone? 

Issues with network can be reported and tracked here https://www.o2.co.uk/apps/my-network

Try wifi calling if on contract and if possible https://www.o2.co.uk/help/international-and-network/wifi/wifi-and-4g-calling