InVision Revolution series car DVD need to unlock region codes

Region codes are only available from the internet by bright people who have figured out how to "Hack" into the software of the device and they call this a "Region Hack", as of this date there are no unlock codes avail for this unit, most of the codes are for mainstream home units and not the car mounted DVD systems. The manufacturer will not provide software updates, the legal status of region hacking is under litigation to determine whether it is copywrite infringement, what this means that soon it will be illegal..

Hola tengo un problema en mi AVIC-x910bt esta bloqueada a la hora de poder ver un video me aparecen que introdusca 3 digitos y asi me la mandaron no encuentro que introducion como puedo hacer ???