Fault Possible Cause
Unable to turn on
the device.
Low or no electricity.
Solution
Connect the adapter to charge.
Quick start and
automatic shutdown.
Insufficient battery capacity. Connect the adapter to charge.
No sound.
Is the connection correct?
Is the volume turned on?
Select the correct sound source input;
adjust the device.
Unable to work with USB.
Is there any mistake
in using the USB cable?
Please use the original
USB cable to make a call.
Invalid key.
The key may be
accidentally Touched.
Long press and hold the power button
for 8seconds to reset the system.
Unable to charge
the device.
The charging device is in fault
or the battery is already full.
Replace it with a charging
device with normal functions.
7.Common faults and troubleshooting
The following table contains common faults and their solutions. Please
read it carefully.
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