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The packet data settings affect all access points using a packet data connection.

 — If you select 

 and you are in a network 

that supports packet data, the device registers to the packet data network and 
short messages are sent using a packet data connection. If you select 

, the device uses a packet data connection only if you start an application 

or function that needs it. The packet data connection can be closed when it is not 
needed by any application. 

If there are no packet data services available and you have chosen 

, 

the device periodically tries to establish a packet data connection.

 — The access point name is needed when you want to use your device 

as a modem with your computer. 

 — Enable or disable the use of HSDPA (network service) 

in UMTS networks.

When HSDPA support is activated, downloading data such as messages, e-mail, 
and browser pages through the cellular network may be faster.

The data call settings affect all access points that use a GSM data call.

 — to set the data call to disconnect automatically after a time-out if 

there is no activity. To enter a time-out, select 

, and enter the time in 

minutes. If you select 

, the data call is not disconnected automatically.

View and edit session initiation protocol (SIP) profiles.

Certain functions, such as web browsing and multimedia messaging, may require 
configuration settings. You may receive the settings from your service provider. 
See "Configuration settings," p. 13.

To delete a configuration, scroll to the configuration, and select 

> 

.

With the access point name control service, you can restrict the use of packet data 
access points. This setting is only available if your USIM card supports the service. 
To change the settings, you need the PIN2 code.