One last question

Which calls are affected?.

If you can receive calls but not make calls, click the first image below "Inbound works, outbound doesn't". If you can make outbound calls but cannot receive any inbound calls, click the second image "Outbound works, inbound doesn't". If neither inbound nor outbound calls are working, click the last image. "Neither Inbound nor outbound work".

Click the image that matches your issue