Solving Problems - Samsung SGH-N400 Owner's Manual

Solving Problems

Before contacting the after-sales service, perform the
following simple checks. They may save you the time
and expense of an unnecessary service call.
When you switch your phone on, the following
messages appear
Insert SIM Card
• Check that the SIM card is correctly installed.
• The phone requires a 3 V SIM card. Please contact
your service provider if you experience any
problems.
Phone Locked
• The automatic locking function has been enabled.
You must enter the phone's password before you
can use the phone.
Enter PIN
• You are using your phone for the first time. You
must enter the Personal Identification Number
supplied with the SIM card.
• The option requiring that the PIN be entered each
time the phone is switched on has been enabled.
You must enter your PIN and then disable this
option if so required.
Enter PUK
• The PIN code was entered wrongly three times in
succession and the phone is now blocked. Enter
the PUK supplied by your network operator.
122
"No service" is displayed
• The network connection was lost. You may be in a
weak reception area (in a tunnel or surrounded by
buildings). Move and try again.
• You are trying to access an option for which you
have not taken out a subscription with your
service provider. Contact the service provider for
further details.
You have entered a number but it was not dialled
• Have you pressed the
• Are you accessing the right cellular network?
• You may have set an outgoing call barring option.
Your correspondent cannot reach you
• Is your phone switched on (
more than one second)?
• Are you accessing the right cellular network?
• You may have set an incoming call barring option.
Your correspondent cannot hear you speaking
• Have you switched off the microphone (Mute
appears)?
• Are you holding the phone close enough to your
mouth? The microphone is located in the bottom
centre of the phone.
The phone starts beeping and "** Warning **
Battery Low" flashes in the display
• The battery is insufficiently charged. Replace the
battery with a charged one and recharge it.
S S o o l l v v i i n n g g P P r r o o b b l l e e m m s s
key?
pressed for
123