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Appendix
Appendix 1
：
Troubleshooting
If you find exceptions when operating the mobile phone, restore the
factory settings and then refer to the following table to solve the
problem. If the problem persists, contact the distributor or service
provider.
Fault
Cause
Solution
SIM card
error
The SIM card is
damaged.
Contact your
network service
provider
The SIM card is not
in position.
Check the SIM card
The metal face of
the SIM card is
polluted.
Clean the SIM card
with a clean cloth
Poor
received
signal
quality
Signals are
obstructed. For
instance, radio
waves cannot be
effectively
transmitted nearby a
high building or in a
basement.
Move to a place
where signals can
be effectively
transmitted
Line congestions
occur when you use
the mobile phone in
high-traffic hours
Avoid using the
mobile phone in
high-traffic hours
The mobile
phone
cannot be
powered on
The battery energy
is exhausted.
Charge the battery
