no cell phones in the hospital or on airplanes!
Most is just a myth.
Most of the medical equipment is designed to work with some degree of interference, not as bad as they claim, yes do not want to risk it of course but been in those areas with the signs that state no cell phones and the doctors and nurses are using them and when asked say sure go ahead no problem. I have been to some places seem more strict than other though, But really, may be possible but would have to get the cell phone right near the body-probe contact area for the pickups on the medical equipment.
At one point a lot of devices were being wireless connected using standard WIFI AP's and maybe could be a potential to clog those channels from all the WIFI ready devices but hardly interference. Today they are using special purpose wireless devices operating on a specific reserved frequencies in more places.
And Aircraft avionics is supposed to be hardened against such interference, should be against an EMF blast, I know ,military aircraft is. Today's digital cell phones unlike the analog predecessors, are very low power, The cell towers however operate at much larger wattage outputs and are not out of range of aircraft. How about this, those setback phones that were on most aircraft at one time, they used the same equipment as cell towers, sometimes sharing same or adjacent land cell frequencies and had to operate at much higher wattage. So if anything was going to interfere would be those towers, not the phones, and much higher power mega watt transmitters for other purposes has not brought down an aircraft yet, they all operate there avionics on different frequencies that other devices so there is no interference.
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