Phone Mutes on Answering Calls and randomly during

Mteach4,

Thank you for trying that. If the issue persists, give the steps in this article a try: If the microphones on your iPhone aren't working.

"If people can't hear you on phone or FaceTime calls

1. Open the Voice Memos app. 
2. Tap the Record button , speak at the bottom of your phone, then stop the recording. 
3. When you play back the memo, you should hear your voice clearly.

If people can't hear you when you're using speakerphone 

1. Open the Camera app.
2. Record a video while speaking at the top of your iPhone.
3. Tap the camera chooser  to switch to the other camera. Then record another video while speaking at the top of your iPhone.
4. When you play back the videos, you should hear your voice clearly."

These two steps can help narrow down the issue. Do you have any Bluetooth devices or headsets connected? If so, disconnect them and try again.

Also, see if the same thing occurs when using FaceTime Audio: Use FaceTime with your iPhone, iPad, or iPod touch - Apple Support

"Make a FaceTime call

To make a FaceTime call, you need the person's phone number or registered email address. There are a few ways to make a FaceTime call: 

• In the FaceTime app, tap New FaceTime and type the person's phone number or email address. Tap the number or address, then tap the Audio button  or   FaceTime."

What is your cellular signal at? Does this happen in multiple locations?

Keep us updated.

Cheers!

Hello Mteach4,

Thanks for reaching out to Apple Support Communities. We see you have some questions about your phone muting when you don't want it to, and we'd like to help. Have you tried to restart your phone, to see if the issue remains? Restart your iPhone - Apple Support

Regards.