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GPRS connection can be closed when it is not needed by any
application.
If there is no GPRS coverage and you have chosen When available, the
phone periodically tries to establish a packet data connection.
Access point — The access point name is needed when you want to use
your phone as a packet data modem to your computer.
SIP settings
SIP (Session Initiation Protocol) profiles include the settings for
communications sessions using SIP protocols. To view, create, and edit
SIP profiles, select Menu > Tools > Settings > Connection > SIP
settings.
Data call
The Data call settings affect all access points that use a GSM data call.
Select Menu > Tools > Settings > Connection > Data call and from the
following options:
Online time — to set the data call to disconnect automatically after a
time-out if there is no activity. To enter a time-out, select User defined,
and enter the time in minutes. If you select Unlimited, the data call is
not disconnected automatically.
Configurations
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. 16.
To view the list of configurations saved to your phone, select Menu >
Tools > Settings > Connection > Configurations. To delete a
configuration, scroll to the configuration, press the scroll key, and select
Delete.