User's Manual

16
Troubleshooting
If you find exceptions when operating the tablet, 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 tablet in high-traffic hours
Avoid using the tablet in high-traffic hours
The tablet cannot
be powered on
The battery energy is exhausted. Charge the battery
The tablet
cannot
connect the
network
The SIM card is invalid Contact your network service provider
The tablet is not in a service area
of the GSM network
Move to the network operator's service area
The signal isweak 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 improper charger is used Use the charger specially designed for the tablet
Poor contact Ensure the charger plug is in good contact with the
tablet