READ IT CAREFULLY:I DO NOT TAKE ANY RESPONSIBILITY IF YOU DO IT IN WRONG WAY OR ANY THING THAT MIGHT HAPPEN TO UR MOBILE.
DO IT ON UR OWN RISK.
THE PROCESS IS VERY SIMPLE AND SHOULD BE DONE EASILY.
PROCESS:
1.Downloadable things:
(i) Wave 575 bada 2.0 firmware.
(ii)Multiloader
this is program named "multiloader" to flash firmwares on samsung devices and also used here.
2.Now its time to start the process:
(I)backup your data and other shit.
(II)connect ur mobile to pc in download mode.(Download mode means turn off ur phone n turn on with VOLUME UP+CAMERA+POWER ON keys ).
(III)open MULTILOADER choose brcm2153 n things as in given image.
(IV)Chose the relative files after extracting the firmware using winrar downlaoded in step 1.(i).
(V)then port search make sure your device is only usb connected.(unplug if any other usb is plugged)
Points to remember:
1. do not plug any other device in starting or in between the process in usb port.
2.it will update bootlader of bada 2.0. u cant downgrade.(u wont as bada 2.0 is really cool)

THIS IS IT AND ENJOY BADA 2.0 AND TELL EVERYBODY IN THIS WORLD WHO IS OWING WAVE 575 TO UPGRADE IT.

HAPPY SHARING