Q: speakerphone shuts off on its own on my iPhone 6s

Hi daytona48,

Thanks for using the Apple Support Communities!

I understand that the speaker on your iPhone isn’t working continuously as expected. We know that these situations can be frustrating, but we’re here to help. 

To begin troubleshooting this situation, i recommend reading over and working through the steps from the following article. 

If you hear no sound or distorted sound from your iPhone, iPad, or iPod touch speaker - Apple Support

Best!