decided to find someplace to post this incase i forgot..
i jailbreak my iphone 3g 4.1, but it has some prob,
the phone icon is gone, cydia cnnt access.
so i wanted to restore and re-jb, cnnt restore,
got error…after many efforts, it appear it can be put into dfu
mode by going into reboot screen and hold power(10),power + home (10),home(30)
and now its restoring.