ZTE Grand X Plus - Manual (Page 184)

184
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
Gas Stations and Explosive Atmosphere
In locations with potentially explosive atmosphere, obey all
posted signs to turn off wireless devices such as your phone or
other radio equipment.
Areas with potentially explosive atmosphere include fueling areas,
below decks on boats, fuel or chemical transfer or storage
facilities, and 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 where signs are posted to power off
“two-way radios” or “electronic devices” to avoid interfering with
blasting operations.