How do I get my health app to accept my iPhone as a data source?

[iMore Question]

The health app has a spot to enter devices whose data can be accepted. The first priority is the phone itself for steps walked, etc.

I can't get the app to accept any device.

 

[Just_Me_D]

Your iPhone is automatically a data source, especially if you've enabled the toggles next to "Fitness Tracking" and "Health" when you go to Settings→ Motion & Fitness.