We'll likely need to troubleshoot the connection on your device. Our knowledge base article on troubleshooting voice calls is the best place to start.
If you run through all those steps and get stuck or it otherwise doesn't work, send an email to firstname.lastname@example.org and we'll work towards a solution together.
I made a change in settings and rebooted the phone works ok now.
Do you remember what setting you changed, to help others who might be having the same issue?
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