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Warnings and Precautions 17
● Do not use your device while flying in an aircraft. Power off your device before boarding
an aircraft. Using wireless devices in an aircraft may cause danger to the operation of
the aircraft and disrupt the wireless telephone network. It may also be considered illegal.
Operating Environment
● Do not use or charge the device in dusty, damp, and dirty places or places with magnetic
fields. Otherwise, it may result in a malfunction of the circuit.
● On a stormy day with thunder, do not use your device, to prevent any danger caused by
lightning.
● Do not install outdoor antenna, because it may damage your device.
● When you are on a call, do not touch the antenna. Touching the antenna affects the call
quality and results in increase in power consumption. As a result, the talk time and the
standby time are reduced.
● Use accessories authorized by the manufacturer. Using unauthorized accessories will
render the warranty null and void.
● Because the device needs to disperse heat during working, place the device and the
power supply in a ventilated and shady place. Never cover the device, put objects on it,
or place it near water, fire as well as inflammable and explosive materials.
● This device should be installed and operated with a minimum distance of 20 cm between
the antenna and all persons.
● Keep the ambient temperature between -10°C and 50°C while the device is being
charged. Keep the ambient temperature between -10°C to 50°C for using the device
powered by a battery.
Safety of Children
Comply with all precautions with regard to children's safety. Letting the child play with your
device or its accessories, which may include parts that can be detached from the device, may
be dangerous, as it may present a choking hazard. Ensure that small children are kept away
from the device and accessories.
Accessories
Use the accessories delivered only by the manufacturer. Using accessories of other
manufacturers or vendors with this device model may invalidate any approval or warranty
applicable to the device; result in the non-operation of the device, and cause danger.
Battery and Charger
● Unplug the charger from the electrical plug and the device when not in use.