Why is it after upgrading to iOS 9, I can't send or receive calls?

[iMore Question]

why after upgrade to ios 9 can't I send or receive calls

After upgrading to ios 9 I can't send or receive calls

 

[qbnkelt]

Re: why after upgrade to ios 9 can't I send or receive calls

After upgrading to ios 9 I can't send or receive calls

I would suggest a reset; hold the home and power button until the Apple logo appears and the release. I actually had to do a couple to get my device sorted out.

 

[bpodany]

Re: why after upgrade to ios 9 can't I send or receive calls

I tried powering down about a half a dozen times and I have the same problem.