Q: my iPhone 6 mic only works on speakerphone

Hello elarsson,

Thanks for posting here. I see your mic only works on speakerphone. I know that it’s important for you to be able to make and receive calls and not have to use speaker phone. 

I have a resource that will help:

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

If after performing those steps, if your mic still doesn’t work, then the issue is likely hardware.  You can have the phone inspected at an Apple Retail Store or Apple Authorized Service Provider. You can find your nearest location here:

Apple - Find Locations

Have a great day!