Just because the hardware is present doesn't mean it's easy to enable. Sure, the radio chip used in the iPhone may have an FM capability, but enabling it requir

Just because the hardware is present doesn't mean it's easy to enable. Sure, the radio chip used in the iPhone may have an FM capability, but enabling it requires resources to write apps supporting it (you'd expect an FM-capable iPhone to have an FM app, right?), handle additional hardware considerations (FM that close to such a compact radio-noisy device may require nontrivial RF electronics & packaging changes), add an antenna (FM antennas are much longer than cellular ones, where to put it?), address convenience factors (using the headphones wire as an antenna only works insofar as there is a wired headphone attached, what about when it's not?), and generally adds complexity to a device that the designers didn't want that capability in to start with. Instead of getting the FM receiver component enabled, you're more likely to have Apple et al tell & pay the radio chip makers to remove FM capability so they don't have to deal with some third party abusing the police power of the state to compel the manufacturers to make something do what they didn't want it to.