I have a phone with an FM receiver active (it uses the headphone cord as an antenna) and this thread got me wondering about things like emergency radio, "scanners", etc. I ended up finding some old threads in other forums with people who found that this phone model's FM rx is in a chip that also has tx capability. But Broadcom doesn't want to share the pin outs and it looks like the threads all died. HTC EVO 4G if anybody's interested. This is along the lines of transmitting for a number of meters, of course, not for communication at a distance.
Correct me if I'm wrong, but I think most cell phones don't have the power supply to transmit FM broadcast band several miles away, let alone the antenna. And if you can't reach across several miles then what is the emergency purpose of the FM rx/tx capability? Anybody nearby is probably going to be similarly affected by said disaster. If you're worried about being separated from loved ones during a tumult, then you're probably going to want to be able to scan for them over a large area.
I'm just not sure what the argument is for having a bunch of underpowered FM rx/tx going on in the middle of a disaster.
Now, if you really want this to go through, what you have to do is find a disaster where all of the following can be clearly shown to be true:
a) numerous people died
b) there was an internet or mobile outage or lack of signal
c) it can be shown that the lack of internet or mobile outage of lack of signal contributed to the untimely deaths
d) it can be shown that a little FM rx/tx would have saved their lives
Just one such occurrence could actually get you want you want. No company likes to be the actual literal bad guy, and these dormant rx and tx capabilities would start showing up a lot more often.
Still I don't think it will get any better than walkie-talkie across a few dozen meters.
Let's say there's a rescue team after you and you need to transmit your location details. If they're that close, you can yell. If you're under a bunch of debris, you're not transmitting very well any way. If you're thinking triangulation and mapping a bunch of blips of potential victims, well they already have GPS operating.
I'm just not seeing the point.