SENDO 300 User Manual page 33

Problem Possible cause
"Blocked" is displayed The NCK code has been
on my handset entered incorrectly 10 times and
the handset has been security
disabled
A key on the keypad is
The keypad is not seated
not working
correctly after removing and
replacing the phone's plastic
cover
Key lock on
Poor display Low temperature
Can't connect to Weak signal
network
Invalid SIM card
Network not allowed
Can't make/receive Weak signal
calls
Phone is switched off
Check the number
Call key not pressed
Network is busy
Call barring or fixed dialling is
activated
Not registered with service
provider
No credit left on your prepaid
card
Possible corrective action
Return the handset to your service operator or to an
authorised Sendo service centre for resetting.
Remove the phone's plastic cover and re-seat the
keypad correctly.
The keypad may be locked. Check the screen for the
γ
symbol. Press
to unlock the keypad.
Move to a warmer place and let the phone warm up.
Move into an area of better coverage. If you are in a
building, move towards a window.
Contact your service provider.
Try reselecting the network. Switch off and then back
on.
Check that the service provider name is displayed on
the screen. If not, try to reconnect to the network or
move to an area with a better signal.
Press δ for a few seconds.
Use the full area code and country code in the
number.
After dialling the number you must press γ,
If you hear rapid beeps, then the network is busy.
Hang up and try again.
Check the fixed dialling settings. Otherwise check
the call barring settings with your service provider.
After purchasing your phone, you may need to call
your service provider to activate the line.
Recharge your credit.
31
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and in quick succession
Call
13
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