8 
 
Do not use your device while flying in an aircraft or 
immediately before boarding. Using wireless devices in an 
aircraft may disrupt wireless networks, present a hazard to 
aircraft operation, or be illegal.   
Operating environment 
 
Avoid dusty, damp, or dirty environments. Avoid magnetic 
fields. Using the device in these environments may result in 
circuit malfunctions. 
 
Do not use your device during thunderstorms to protect 
your device against any danger caused by lightning.   
 
Ideal operating temperatures are 0
℃
  to 35
℃
. Ideal 
storage temperatures are -20
℃
  to 45
℃
. Extreme heat or 
cold may damage your device or accessories. 
 
Do not expose your device to direct sunlight (such as on a 
car dashboard) for prolonged periods.   
 
To protect your device or accessories from fire or electrical 
shock hazards, avoid rain and moisture. 
 
Keep the device away from sources of heat and fire, such as 
a heater, microwave oven, stove, water heater, radiator, or 
candle. 
 
Do not place sharp metal objects, such as pins, near the 
earpiece or speaker. The earpiece may attract these objects 
and result in injury.   
 
Stop using your device or applications for a while if the 
device is overheated. If skin is exposed to an overheated 
device for an extended period, low temperature burn 
symptoms, such as red spots and darker pigmentation, may 
occur.   
 
Do not use your device's camera flash directly in the eyes of 
people or pets. Otherwise temporary loss of vision or 
damage to the eyes may occur. 
 
Do not touch the device's antenna. Otherwise, 
communication quality may be reduced.   
 
Do not allow children or pets to bite or suck the device or 
accessories. Doing so may result in damage or explosion.