Cannot make or receive calls on mobile

[Wendymoon1]

Cannot make or receive calls on myiPhone 5

[Bambino]

@Wendymoon1 You can check to see if there is an outage in your area here: http://status.o2.co.uk/

If there is a problem, you can download the MyNetwork app and report it: https://www.o2.co.uk/apps/my-network

[MI5]

See our help here to determine where the problem lies https://community.o2.co.uk/t5/Pay-Monthly-Pay-and-Go/How-can-I-sort-out-my-network-issues/ba-p/10140...

[Anonymous]

Have you tried lightly cleaning the SIM card 

[Marjo]

Hey @Wendymoon1 welcome to our forum! Did the above suggestions help out with the issue or are you still struggling with calls? Please do let us know how you're getting on.

Cheers guys for your help @Bambino, @MI5, @Anonymous!