[RajT88]

I've read that most phones have a built-in FM tuner, but it's disabled for the US market because telcos wanted you to buy music from their store.

It was true at one point - I owned at least one phone with a disabled FM radio.

Some cursory checks on my current phone suggest it's got one (just doesn't work for some reason with FM Tuner apps).

[Neikius]

They usually require headphones plugged into 3.5mm jack...

[RajT88]

The tuner app says the radio is not present. I am on LineageOS so there is many possible reasons for it not working.

But, there are folks complaining about how Samsung broke FM tuners with an update on this phone a few years back. Who knows what that is about.

[bombela]

yep, the headphone cable acts as the antenna!