I'm required to develop an application that can send MMS from PC to mobile using GPRS modem. I have read the discussion titled "How to send MMS via PC" and I also understand that I can encode the MMS using Nokia MMS Java library and sending it by using WAP stack. I also have tried the jWAP library "CWapPostExample.java" example to send MMS. But one of the parameter is the wap getway IP address and port. I'm not so sure about this wap getway and its port. Is it the service provider IP add or we need to create our own? and the port, is it defined or we can put any number in it? Thank you for ur explaination.