Comment "Free" FM comes with a cost (Score 0, Offtopic) 34
The FM Receiver isn't enabled in most phones because the electronics required to use the headset shield as an FM antenna increase crosstalk on the 3.5mm jack. Phones without FM chose to emphasize 3.5mm audio quality over FM radio function.
This is trivially easy to confirm - just check the headset crosstalk numbers on any Android review site. You'll find a bi-modal distribution that correlates to presence of an FM receiver.