Zte A139+ User Manual page 18

Aircraft Safety
Please turn off your mobile phone before the airplane takes off. In order to protect
airplane's communication system from interference, it is forbidden to use mobile
phone in flight. Using mobile phone before the plane taking off should get aircrew's
permission according to safety regulations.
If the mobile phone comprises the function of automatic timing power-on, please
check your alarm setting to ensure that your phone will not be automatically turned
on during flight.
Battery Use
Do not short-circuit the battery, as this can cause overheating to bring about fire.
Do not store battery in hot areas or throw it into fire. Otherwise, it will cause
explosion.
Do not disassemble or refit the battery. Otherwise, it will cause liquid leakage,
overheating, explosion and ignition of the battery.
Please store the battery in a cool dry place if you don't use it for a long period.
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