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17
appendix
Appendix 1 – Troubleshooting
If you find exceptions when operating your 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 contacts of
the SIM card are dirty. Clean the SIM card with
a clean cloth
Poor received
signal quality
Signals are obstructed.
For instance, radio waves
cannot be effectively
transmitted due to being
nearby a high building
or you are located in
a basement.
Move to a place
where signals can be
effectively transmitted
Line congestion occurs
when you use your mobile
phone in high-traffic hours
Avoid using your mobile
phone in high-traffic hours
Your mobile
phone cannot
be powered on
The battery
requires charging.
Charge the battery
Calls cannot
be dialed
Call barring is activated Cancel call barring
Your mobile
phone cannot
connect
the network
The SIM card is invalid
Contact your network
service provider
Your mobile phone is not in
a service area of the GSM
network
Move to the network
operator's service area
The signal is weak
Move to a place where the
signal quality is high
The battery
cannot
be charged
The charging voltage does
not match the voltage range
indicated on the charger
Ensure the charging
voltage matches the
voltage range indicated on
the charger
An incorrect charger
is used
Use the charger
specially designed for
your mobile phone
Poor contact
Ensure the charger plug
is in good contact with
your mobile phone
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