Can my application receive SMS without port number?

[Eric Leung Kwok Chung]

I am new to J2ME development, I am researching on how to send a SMS without setting a port number. I have successfully implemented a P2P messaging demo with port number, however, I can't complete a demo that is without port number. Everytime the connection.open() failed, if I don't set the port number. Can any expert helps me on this?

Thanks for the expertise.