ZTE Kis3 - Manual (Page 171)

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Consult the airline staff about the use of wireless devices on
board the aircraft and enable the airplane mode of your phone
when boarding an aircraft.
Interference in Vehicles
Please note that because of possible interference to
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.
Areas with potentially explosive atmospheres include fueling
areas, below decks on boats, fuel or chemical transfer or storage
facilities, areas where the air contains chemicals or particles,
such as grain, dust, or metal powders.
Blasting Caps and Areas
Power off your mobile phone or wireless device when in a
blasting area or in areas posted power off “two-way radios” or
“electronic devices” to avoid interfering with blasting operations.