5
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
SIM card
error
Poor
received
signal
quality
The
mobile
phone
cannot be
powered
on
Calls
cannot be
dialed
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 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.
Call barring is activated
Solution
Contact your network
service provider
Check the SIM card
Clean the SIM card with
a clean cloth
Move to a place where
signals can be effectively
transmitted
Avoid using the mobile
phone in high-traffic
hours
Charge the battery
Cancel call barring
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