Ok guys you are my last hope before i have to send my f900bt in for service. It went crazy last night and while a reboot fixed most problems, whenever i try to change the voice for my navi the unit just locks up and i have to reset it again. Also my 3d maps dont look 3d but rather just look 2d with the compass that moves the maps around unlocked. Does anyone have answers to either of these problems? Thanks a million.