The reason why FM receivers are present on smartphones is that they can be used to locate your position by noting a simple thing as signal strength of transmitters. More advanced methods makes use of SNR, frequency deviation and multipath interference characteristics. And the same method can be used for WiFi which of course makes collection of such data very useful for localization purposes where GPS etc isn't useful. Arrival time of a radio signal that is reported to the operator from many devices may also be used for the same purpose.
(Score: 2) by urza9814 on Thursday May 22 2014, @05:09PM
You'd be surprised. It actually seems to be quite common for used vehicles -- ie, you buy a former corporate car, and the corporation either prepaid that subscription or just never bothered to cancel it. As a result -- you get free XM.
I never said you couldn't find ANY phone from whatever obscure manufacturer that included it, I only said it certainly wasn't "EVERY modern smartphone". Not even a majority. Sony has less than 2% market share (it's in the combined 2% 'Others' category according to Nielson). Not a single one of the manufacturers you listed is above single digits. So yeah, maybe ~20% of smartphones contain an FM radio. If it was a feature in high demand it would be on far more.
Quite possible. That's why so many of my statements were qualified with "Around here..." "Nobody I know..." "maybe it's different where you live..." and such.