This is because your iphone has three microphones:

Iphone headset mic not working. On your iphone or ipad, open the voice memos app. 13 ways to fix an iphone microphone that’s not working. Web possible reasons why your iphone microphone is not working;

Web level 1 13 points my bluetooth microphone won’t work hello, i need help here. Web check to see if the microphone is working. If your headphones don't work with your iphone, ipad, or ipod.

Make sure microphone access is enabled; So connected my bluetooth device on my iphone xr, but the microphone won't work for some reason. The first basic thing you need to do when your microphone stops working properly is to check the microphone grill at the bottom of your iphone.

Iphone microphones are sensitive, and a small piece of dust or dander can affect how they sound. Select change, then turn on allow apps to access your microphone. Web make sure apps have access to the microphone.

If any of your microphones sound muffled when you speak, they might need a good cleaning. Web go to settings > privacy > microphone. Web in fact, a loose headphone jack could be the cause behind the mic not working, as the jack conductors may not be making contact.

Select view all on the top left corner. Make sure the app is enabled. It is showing it's working for a second then it just immediately stopped.