Sharp SX813 User Manual page 141

Problem
• If the message "SIM card
• Check your call barring,
Calls cannot be made
or received.
• Check if your phone is
• Check the remaining
• Your current location may
Call quality is poor.
Solution
error" is displayed when the
phone is switched on, you
cannot use your SIM card or
the SIM card is damaged.
Contact your dealer or
network service provider.
fixed dialling setting,
remaining battery and call
forwarding settings.
currently performing data
communication using
Infrared (IrDA), Bluetooth
wireless technology
interface or a USB data
cable.
balance if you are using a
pre-paid SIM card.
not provide good call quality
(i.e., in a car or train). Move
to a location where radio
signal strength is greater.
Problem
• Check where your account
Cannot access
network service.
• Make sure you are correctly
Cannot send or
receive text message.
• MMS settings and
Cannot connect to
Multimedia Messaging
Service provider.
• Delete any unnecessary
Limited memory
available.
Solution
has been registered and
where the service is
available.
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.
configuration may be
missing or incorrect or the
network does not support it.
Check your service
provider's access point
number.
Contact your service
provider to confirm the
correct settings.
data.
Troubleshooting 141