My wife has been making calls to the UK for a number of years. One of the three numbers she calls, no longer connects. Just silence. We tried with my phone. Same results.
I called random numbers in the same UK town. Some rang. Others silent.
I setup a trial of Viber Out (like WhatsApp) and was able to make calls to the number that would not connect.
We’ve done the network reset, reboot.
Stumped and frustrated.
Thanks