I would like an USB FM transmitter which shows up as an USB audio card.

You set the sound card output at your OS settings and everything it's broadcasted over FM.

I know some of them exist for bluetooth audio, but not for FM.

It would be cool to have this in one unit, but it's also easy to put together by combining two readily-available devices:

- a USB sound card with 3.5mm jack, and

- an FM transmitter module (which can usually be powered with 3v-12v, so should be able to work with 5v USB power

This is an interesting challenge, would be a great homebrew project.

(If I wasn't already neck deep in interesting challenges I would consider picking this one up)

The 'Roav by Anker Bluetooth FM transmitter' is amazing. So much better than the generic ones, and well worth the extra money.

It provides a good signal, is easy to adjust, and works well for phone calls (not just music).

Does it output music in stereo with separate left right channels? The few I tried treat all audio as a mono source, throwing away the left or right track. Searching amazon reviews for this information has been frustrating because stereo can also refer to the head unit and speakers. The NULAXY had this issue for me.

"Does it output music in stereo with separate left right channels?"

Sorry, I don't know. It's in my parents' car, so I won't be able to check until the next time I visit them.

I want a damn CELLPHONE with FM/AM radio RECEIVER!

So you can get radio when there is no cell or data service - like when camping or hiking etc.

I believe the iPhone has such a receiver but it’s not enabled.

Mobile phones have regressed in several areas. This is one definitely.

Most Android phones with a 3.5mm jack have this

The Nokia N900 has an FM transmitter built in