Originally Posted by rickair7777

On several airplanes I have flown a cell phone in the cockpit or in the right place in the cabin causes noticeable interference on the VHF comm radios...it's not implausible that it could also degrade a LOC which is on the adjacent frequency range to comms. Who knows what else could be effected. Is it going to cause the explosive bolts on the wings to fire, dooming the airplane? No. But it might create an unneeded distraction at the wrong moment.

Also an analog cell phone (still used in some less-populated areas of the US) in the back seat row will set off the cargo smoke detector in a CRJ 200...that's an automatic blow the bottles and land at nearest suitable...$$$$$$$