Sharp 770SH User Guide - Page 150

Problem Calls cannot be made or received. Cannot access network service. Limited memory available. Solution • If the message "Insert SIM card" 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. • Check your call barring, fixed dialling setting, remaining battery and call forwarding settings. • Check if your phone is currently performing data communication using Bluetooth wireless technology interface or a USB data cable. • Check the remaining balance if you are using a pre-paid SIM card. • Check where your account has been registered and where the service is available. • Delete any unnecessary data. Problem Cannot connect to Multimedia Messaging Service provider. Call is terminated unexpectedly. No entries are displayed in the Contacts List. Cannot receive OBEX data. Solution • MMS settings and 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. • Magnetised objects such as health necklaces placed near the phone may terminate the call. Keep your phone away from such objects. • Confirm that the Contacts Location setting (Handset or SIM) is correct. • The OBEX data can only be received in standby. Troubleshooting 149