Ans:
1.Nokia 7650
2.SHARP J-SH04 (November 2000)
3.Nokia 3510i
4.The Virgin Mobile branded Samsung SGH M100
(19/08/2000
Virgin Mobile today launched the world's first mobile phone with an integrated MP3 player at the V2000 music festival, Hylands Park, Chelmsford)
Source:h**p://eurotechnology.com/camera-phone/index.html
h**p://press.nokia.com/
PR/200111/840889_5.html
h**p://www.esato.com/phones/index.php/phone=99,cp=48
h**p://about.virginmobile.com/aboutus/media/news/2000/2000-08-19/
( Only the 3rd qn is not clear,MMS started appearing in 3510i,I think it needs further confirmation about other manufacturers)