I'm using centos 5.4 with vlc streaming server i can do the streaming on http,https but when i wanted to rtsp and rtp which i wanted to config for all the wifi phone. From the server it will redirect to wifi router.
I am assuming you are asking about streaming rtsp as a format your phone can connect to, in addition to a (different/separate) format your desktop clients currently have working? I could be wrong, but it sounds like wifi has nothing to do with the question. If the actual problem is only happening when clients are on wifi rather then a wired connection, that will open up a whole new world of possibilities rather then just the actual stream itself.
Additional clarification would go a long way in us helping you with your issue. Also be sure to confirm that everyone on their phone is actually connecting through internal wifi (same as laptop users) and not a cellular connection like 3g/edge/etc (coming in from the outside world).
If you are asking about vlc and rtsp/rtp streaming, start here: http://www.videolan.org/doc/streaming-howto/en/ch04.html#id311704