my mobile is nokia6600, but it can not play real video(eg:rtsp://someserver/1.3gp).I make a stream server with realnetworks helix universal server and it worked well in internet. but when I play it in 6600, only time length can got and it stopped . the test video clip is very small with the bitrate lower than 30k, after then ,I test a clip with video only,and 6600 found that clip has on audio, but it can not work any far,can anyone tell me what is the problem,thanks!