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Frequently Asked Questions
Frequently
Asked
Questions
Cause and Solution
Fail to turn
on
Press the power key for over 1 second.
Check if the battery is properly connected. Please remove and install it again
and retry;
Check if battery is appropriately charged.
Fail to
connect
network
In case of Weak signal, please try and move to a location with strong signal and
try connecting to the network again;
Please ensure that you are not beyond the network coverage of service
providers;
Please ensure you have a valid SIM card. Please contact your network
provider for further information.
Display
information
while
turning on
Check if the SIM card is installed correctly
Handset lock password: If the handset lock is activated, you have to input
handset password.
Input PIN:
if Inputting PIN while turning the phone on each time is activated,
you have to input the PIN code.
Input PUK code:
When you’ve input wrong PIN code for 3 times will lock the
SIM card. You need to input the PUK code provided by your network provider.
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 can
not 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.
The battery or charger is damaged in which case you need to replace it.
Summary of Contents for KKT 20+
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