123 
Medical Equipment 
Switch off your wireless device when you are requested to do 
so in hospitals, clinics or healthcare facilities. These requests 
are designed to prevent possible interference with sensitive 
medical equipment. 
Aircraft 
Switch off your wireless device whenever you are instructed to do 
so by airport or airline staff. 
Consult the airline staff about the use of wireless devices 
onboard the aircraft and enable aeroplane mode of your phone 
when boarding an aircraft. 
Interference in Vehicles 
Please note that because of possible interference with electronic 
equipment, some vehicle manufacturers forbid the use of mobile 
phones in their vehicles unless a hands-free kit with an external 
antenna is included in the installation. 
Explosive Environments 
Petrol Stations and Explosive Atmospheres 
In locations with potentially explosive atmospheres, obey all 
posted signs to turn off wireless devices such as your phone or 
other radio equipment.