chemicals or particles, such as grain, dust, or metal powders; or any other area where you would normally be advised to turn off your vehicle's engine. Electric or static sparks in such areas could cause an explosion or fire resulting in serious injury or even fatalities.
Switch off your phone on aircraft
Follow airline advisories on phone usage. Radio Frequency emissions from wireless devices such as your phone can cause electronic interference or disturbance in the delicate communication and control electronic equipment of the aircraft.
Switch off your phone in the hospital
Switch off your phone in healthcare facilities when any regulations posted in these areas instruct you to do so. Hospitals or healthcare facilities may be using equipment that could be sensitive to external RF energy.
Pacemakers and medical implants
The Health Industry Manufacturers Association (USA) recommends that a minimum separation of six inches (15 centimetres) be maintained between a handheld wireless product and medical implants (electronic) such as a Pacemaker to avoid potential interference with the implant. These recommendations are consistent with the international recommendations 2
