Originally Posted by ScottC
There is absolutely no way in the world that a Bluetooth transmitter will be able to reach the cockpit... With it's extremely low power it's not going to be a problem, however it is still not permitted.
Even WiFi shouldn't be a problem. GSM phones however ARE a problem as they are capable of transmitting at a full 2watts, enough to possibly cause problems.
It doesn't have to reach the cockpit in order to cause interference. Being near a nearby antenna or wiring harness may also suffice.
As I've mentioned in other threads, it has been demonstrated to me that electronic devices in the cabin can cause interference on the radios. IMO, the interference was not flight-threatening, but I must reject any argument that suggests electronic devices can not have any impact at all on the aircraft.