User's Manual

5.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
Calls cannot be
dialed
Call barring is activated Cancel call barring
The mobile
phone cannot
connect the
network
The SIM card is invalid
Contact your network service
provider
The 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
thecharger
An improper charger is used
Use the charger specially designed
for the mobile phone
Poor contact
Ensure the charger plug is in good
contact with the mobile phone