until now i found that how i can flash my i300.(many thanx to DingsDa )
but there isn't any wm5 rom for i300 or samsung wasn't
release any wm5 rom for i300.
i suggest someone with good english ( my english is'nt so good) create a web Petition for samsung company to release a wm5 rom for our i300.
in this site: http://www.petitiononline.com/
i know last series of i300 have wm5.
may samsung
accept our need.