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13
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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 the charger
