When you use the BIS for the connection (without APN) the TCP stack in the device is not used, the BIS establishes the connection and communicates with the BB using some RIM proprietary protocol. When you specify an APN the TCP stack in the device is used, and tries to negotiate a connection through the carrier APN specified.
The malformed address error, I think, indicates that some portion of the URL you specified is syntactically incorrect, or not supported by the BIS. |