The highest official release from Verizon is 2.3.4 gingerbread. There is a leaked 2.3.5. Version out but is only used for eclipse custom rom. If u have just got ur x2 it is prolly on the latest. We do have root and some custom roms, including cyanogenmod 7. To study up on that jazz head over to xda forums its more for development. Read read read before messing w any of that and good luck!!!