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Troubleshooting checklist
If you experience any problem while using your mobile
phone, please refer to the following checklist. If the problem
still persists, contact your dealer or nearest service carrier.
When the “Insert SIM Card” message appears:
Make sure the SIM card is correctly installed. Check to see
if the SIM card is working properly. If it does not work, try to
clean the contact points of the card. If it is out of order, take
it to the nearest service carrier.
When the “Password” message appears in Phone
locked state:
Enter the phone password. The default password is”1234”.
If you cannot remember the password, contact the nearest
service carrier.
When the “Enter PIN1” message appears:
Input PIN1. If you cannot remember it, contact the nearest
Cingular Shop. You can still receive calls even if your mobile
phone becomes locked after entering the incorrect PIN1 on
three consecutive attempts.
When the “No Service” or “Network Search”
appears:
If you cannot make/receive a call when you are indoors
or undergrounds where the signal strength is poor, move
toward a window or go out to an open area. If you still
cannot make a connection, contact the nearest service
carrier.
When audio quality is poor:
End a call and try again.
When the other party cannot hear you speaking:
Your phone may be set to MUTE. Disable the MUTE
function.
When battery lifetime is shorter than usual:
This may happen when you are in an area with low signal
strength. Turn off your phone when it is not in use. Change
the battery when battery energy is exhausted.
When your mobile phone does not turn on:
Make sure your battery is charged. Check to see if your
phone works while recharging the battery.
When you are unable to send a message:
Either you are not registered to receive an SMS service, or
you may be in an area where your network service provider
cannot provide such a service.
When you are unable to make a call:
Your phone may be set to “fixed dial.” Cancel the “fixed dial”
function.
060613_C120_EN_REV01.indd 87 2006.6.13 4:57:4 PM