can not make ir receive calls

Have a look at the status tracker at the top of the page 

Hi ​@lewishelena 

Thank you for reaching out to us here on the community.

We're aware of a network wide issue affecting services, unfortunately we do not have a time frame of when this will be resolved.

We apologise for any inconvenience caused and want to assure you this is high priority and our team are working hard to get this repaired as quickly as possible.

Updates for the outage can be found here. 

Thanks, 

Nat