Cannot power on
Insert the SIM card
but cannot read the
Cannot make phone
Poor voice quality
The contact cannot
get your voice during
the phone call
6. Warnings and Precautions
This section contains important information pertaining to the operating instructions of your
device. It also contains information about how to use the device safely. Read this
information carefully before using your device.
Power off your device if using the device is prohibited. Do not use the device when
using the device causes danger or interference with electronic devices.
• Follow rules and regulations set forth by hospitals and health care facilities. Do not use
your device when using the device is prohibited.
• Pacemaker manufacturers recommend that a minimum distance of 15 cm be
maintained between a device and a pacemaker to prevent potential interference with
the pacemaker. If you are using a pacemaker, use the device on the opposite side of the
pacemaker and do not carry the
device in your front pocket.
Potentially Explosive Atmosphere
Power off your device in any area with a potentially explosive atmosphere, and comply
with all signs and instructions. Areas that may have potentially explosive atmospheres
include the areas where you would normally be advised to turn off your vehicle engine.
Triggering of sparks in such areas could cause an explosion or a fire, resulting in bodily
injuries or even deaths. Do not power on your device at refueling points such as service
stations. Comply with restrictions on the use of radio equipment in fuel depots, storage,
and distribution areas, and chemical plants. In addition, adhere to restrictions in areas
where blasting operations are in progress. Before using the device, watch out for areas
that have potentially explosive atmospheres that are often, but not always, clearly
marked. Such locations include areas below the deck on boats, chemical transfer or
and the power source jack.
Please check if the battery level is too low;
Please check if the battery is properly loaded;
Please press power key for enough time.
Please check if the SIM card is properly inserted;
Please check if your SIM card is valid.
Please check if the phone number is valid.
Please check if you are in service area.
Please check if the phone signal is strong enough.
If you are in a building, please move near the window.
Please check if your mike is blocked by fittings or other blocks.