Cannot make calls, mic and speaker not working
I have reset, rebooted and restored my iPhone 7 and cannot make calls on phone or WhatsApp. I have checked the mic and speakers in a video and get no sound on playback. The speaker works on iTunes. When I try to make a WhatsApp call I get a message saying 'You cannot make a WhatsApp call if you're already on another call'
iPhone 7, iOS 13