Sharp 770SH User Guide - Page 149

Troubleshooting

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Troubleshooting Problem The phone does not turn on. PIN code or PIN2 code is rejected. The SIM card becomes locked. Solution • Make sure the battery is properly inserted and charged. • Make sure you have entered the correct code (4 to 8 digits). • Your SIM card/protected functions will become locked after three unsuccessful attempts. • Contact your SIM provider if you do not have the correct PIN code. • Enter the PUK code (8 digits) provided by your service provider (if supported). • If the attempt is successful, enter the new PIN code and confirm your phone is operational again. Otherwise contact your dealer. Problem The display is difficult to read. Phone functions do not work after the phone is turned on. Call quality is poor. Cannot send or receive text message. Solution • Adjust the backlight brightness for the display. • Check the radio signal strength indicator as you may be outside the service area. • Check to see if any error message is displayed when you turn your phone on. If so, contact your dealer. • Make sure the SIM card is correctly inserted. • Your current location may not provide good call quality (i.e., in a car or train). Move to a location where radio signal strength is greater. • Make sure you are correctly subscribed for the Short Message Service, that the network supports this service, and that the centre number is set up correctly. If not, contact your network service provider. 148 Troubleshooting

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148
Troubleshooting
Troubleshooting
Problem
Solution
The phone does not
turn on.
•
Make sure the battery is
properly inserted and
charged.
PIN code or PIN2
code is rejected.
•
Make sure you have entered
the correct code (4 to 8
digits).
•
Your SIM card/protected
functions will become locked
after three unsuccessful
attempts.
•
Contact your SIM provider if
you do not have the correct
PIN code.
The SIM card
becomes locked.
•
Enter the PUK code (8 digits)
provided by your service
provider (if supported).
•
If the attempt is successful,
enter the new PIN code and
confirm your phone is
operational again. Otherwise
contact your dealer.
The display is
difficult to read.
•
Adjust the backlight
brightness for the display.
Phone functions do
not work after the
phone is turned on.
•
Check the radio signal
strength indicator as you may
be outside the service area.
•
Check to see if any error
message is displayed when
you turn your phone on. If so,
contact your dealer.
•
Make sure the SIM card is
correctly inserted.
Call quality is poor.
•
Your current location may not
provide good call quality (i.e.,
in a car or train). Move to a
location where radio signal
strength is greater.
Cannot send or
receive text
message.
•
Make sure you are correctly
subscribed for the Short
Message Service, that the
network supports this service,
and that the centre number is
set up correctly. If not, contact
your network service
provider.
Problem
Solution