Potentially unsafe areas
Posted facilities—Turn your phone off in any facility when posted notices require you to do so.
Aircraft—FCC regulations prohibit using your phone on a plane that is in the air. Turn your phone off before boarding aircraft.
Vehicles—RF signals may affect improperly installed or inadequately shielded electronic systems in motor vehicles. Check with the manufacturer of the device to determine if it is adequately shielded from external RF energy. Your physician may be able to help you obtain this information.
Blasting areas—Turn off your phone where blasting is in progress. Observe restrictions, and follow any regulations or rules.
Potentially explosive atmospheres—Turn off your phone when you are in any area with a potentially explosive atmosphere. Obey all signs and instructions. Sparks in such areas could cause an explosion or fire, resulting in bodily injury or death.
Areas with a potentially explosive atmosphere are often, but not always, clearly marked. They include:
