Select Menu > Settings and Connectivity > Connection mgr..
In the active data connections view, you can see the open data connections:
packet data connections
The actual invoice for calls and services from your service provider may vary, depending on network features, rounding off for billing, taxes, and so forth.
To end a connection, select Options > Disconnect.
To end all open connections, select Options > Disconnect all.
To view the details of a connection, select Options > Details.