Lava 3G 402 User Manual page 27

Poor quality of calling
Standby duration
shortened
SIM Card Error
Unable to dial out
27
Please check if the sound volume is tuned improperly
In an area with poor receiving condition, example: basement, the
signal might be weak. Try reaching a location with stronger signal
reception and call again.
While using the mobile phone in the peak period of communication,
like commute time, you may be unable to call because of line
congestion.
The standby duration is relative to the system setting of network.
While the mobile phone is in an area with poor signal strength and can
not receive the signal, the handset will continuously search for a base
station. This will significantly reduce battery charge. It is recommended
that you turn off your mobile in area with no signal reception to save
battery.
Need replacing the battery. Please change a new battery.
Dirt on the metal surface of an SIM card. Use clean cloth to wipe the
metal touch point on an SIM card.
The SIM card is not installed.
The SIM card is damaged. Please contact your network service
provider.
Please confirm if you pressed the dial key after dialing.
Please confirm if calling is forbidden because of default settings.
Please confirm if the SIM is valid.
Please confirm if the call barring is set.