Samsung SGH-Z720 User Manual page 116

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"PUK lock"
The PIN code was entered incorrectly
three times, and the USIM/SIM card is
now blocked. Enter the PUK supplied by
your service provider.
"No service," "Network failure," or "Not
done"
displays
The network connection has been lost.
You may be in a weak signal area. Move
and try again.
You are trying to access an option for
which you have no subscription with your
service provider. Contact the service
provider for further details.
You have entered a number but it was
not dialled
Be sure that you have pressed [
Be sure that you have accessed the right
cellular network.
Be sure that you have not set an
outgoing call barring option.
Your correspondent cannot reach you
Be sure that your phone is switched on.
([
] pressed for more than one
second.)
Be sure that you are accessing the right
cellular network.
Be sure that you have not set an
incoming call barring option.
Your correspondent cannot hear you
speaking
Be sure that you have switched on the
microphone.
Be sure that you are holding the phone
close enough to your mouth. The
microphone is located at the bottom of
the phone.
].
The phone starts beeping and "Low
battery" flashes on the display
Your battery is insufficiently charged.
Recharge the battery.
The audio quality of the call is poor
Check the signal strength indicator on
the display (
indicates the signal strength from strong
(
). The number of bars
) to weak ( ).
113

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