Lava Mobiles KKT 21 - Manual (Page 25)

25
Poor quality of
calling
Please check if the sound volume is tuned properly
In an area with poor network conditions, example: basement, the signal might be weak. Try searching 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 not be able to
call because of line congestion.
Standby duration
shortened
The standby duration is relative to the network systems. While the mobile phone is in an area with poor signal
strength and cannot 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 to a new battery as battery performance may decrease after
prolonged usage.
SIM Card Error
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.
Fail to dial out
Please check if you press the dial key after typing the number.
Please check if calling is forbidden because of default settings.
Please check if the SIM is valid.
Please check if the call barring is set.
Please check if the fixed dial function is set.
Callers cannot
contact you
Please check if the mobile phone is on and connected with the network.
Please check if the Call barring or call divert is activated.
Please check if the SIM card is valid.
Fail to charge
May be due to poor contact. Please check if the plug is connected well.
Please confirm if the environment temperature is within the range of 0ºC ~40ºC while charging.
If the battery or charger is damaged in that case you need to replace it.