I hope (1) FM radio receivers come back, (2) and phones implement a way to grab the waveform and modify it before it hits the speakers. I can imagine useful pu

I hope (1) FM radio receivers come back, (2) and phones implement a way to grab the waveform and modify it before it hits the speakers. I can imagine useful public-safety capabilities that could be enabled via data over FM radio. FM radio is an insanely low-power, low-tech way to do medium-range one-to-many wireless communications.