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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
SIM
card
error
Poor received
signal quality
The mobile
phone cannot
be powered on
Cause
The SIM card
is damaged.
The SIM card
is not in
position.
The metal
face of the
SIM card is
polluted.
Signals are
obstructed.
For instance,
radio waves
cannot be
Move to a place where signals can be effectively transmitted
effectively
transmitted
nearby a high
building or in
a basement.
Line
congestions
occur when
you use the
mobile phone
in high-traffic
hours
The battery
energy is
exhausted.
5 Appendix
Solution
Contact your network service provider
Check the SIM card
Clean the SIM card with a clean cloth
Avoid using the mobile phone in high-traffic hours
Charge the battery
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