IPhone 7 says No Audio Devices Found headphones also won't work. Bluetooth will. Can't make cause because of this. Solutions?

IPhone 7 says No Audio Devices Found headphones also won't work. Bluetooth will. Can't make cause because of this. Solutions?

The only built-in headphone connection with an iphone 7 is Bluetooth.

To use Wired headphones you need a lightning to audio adapter.

Lightning port devices _must_ be from reputable makers to work; they are incredibly complex & most cheap ones are simply fakes.
The headphone adapter is something like the equivalent of a PC "Sound card" packed in to the lightning plug.

Get the real apple one or a one from a big-name maker and it should work fine.

Or, get a bluetooth headphone adapter off ebay. They are quite cheap and allow any wired headphones to be used with anything that has bluetooth.
eg.

Use a genuine Apple headphone adapter.