GPRS/CSD: Use the GPRS network preferentially. Only if there is no GPRS network present will the dialup network be used.
GPRS: Use only the GPRS network.
CSD/GPRS: Use the dialup network preferentially. Only if there is no dialup network will the GPRS network be used.
CSD: Use only the dialup network.
/A dialup network is a GSM Circuit Switch Data Service (CSD for short). Using a dialup network can be likened to using a home computer's modem, in that before connecting to the Internet a number must be dialed. As for GPRS, it like the LANs used at company, where users do not need to dial a number to access the network. Regular GSM users who are not using a GPRS network system can only have a dialup connection to the Internet.
•GPRS: To modify settings for a GPRS account, press
(Edit) to edit the settings in each field. GPRS settings include the following fields:
APN: Enter the APN (Access Point Name) assigned by your network operator.
User Name: If needed, enter the user name provided by your network operator.
Password: If needed, enter the account password provided by your network operator.
•CSD: If you are using a GSM network, you must configure
and activate a CSD account. Press 
(Edit) to edit the settings in the following fields:
