When I call out or answer a call there is no sound. What to do?

[iMore Question]

This happened suddenly. Checked settings and all seemed ok.

 

[Annie_M]

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[Just_Me_D]

This happened suddenly. Checked settings and all seemed ok.

I'm going to assume this is occurring on a smartphone. If so, your smartphone may be connected to a Bluetooth headset that you may not have been wearing when you attempted to make or answer a call.