download Xs++ 3.1 and when the program starts click connect reinstall ur batt and press C while connecting the usb to ur phone it will show u ur firmware version u can search the same one or u can update to R1KG001 this firmware is bug free if u want more information for flashing cell serach the forum.....
and for cam man im also having prob from a month my cell hangs in any cam option im unable to fix this prob and searching the forums for cam fix but ur prob of cam will also be fixed by the above method...