No network

[Jojo78]

I cannot make any calls. It keeps saying call failed 

[jonsie]

See if these links help

Guide: How can I sort out my network issues? 

Guide: Is the network down for me or everyone? 

Guide: How to find help & contact O2 

[Oxonian]

You can report your network issues @Jojo78 using this app :- 

My Network App - Find Out More About Your Network Coverage | Apps | O2

https://www.o2.co.uk/apps/my-network