Q: my iPhone 6 accidentally mutes

Hi there Joe,

If I understand correctly, there's an issue with the microphones on your iPhone 6 not working as expected and you're concerned that you're accidentally muting the device.  Try taking a look at the article linked below which provides a lot of great information and troubleshooting tips that will resolve most microphone related issues on iOS devices.

Get help with the microphones on your iPhone, iPad, and iPod touch - Apple Support

Ciao.