HI there,
I have a avic 920bt and my brother has a avic 930bt.Just wondering if this could be upgraded to 940bt 4.0 and bluetooth 3.24 i think. Some say the lose the voice commands , bluetooth does not function.Is there upgrade worth be done.I dont know much about these things dont want to screw up the units.The last time i did this was 700bt and i purchased this sd on ebay and followed the instructions and copied everything on to the unit and did not fit , ie the maps and upgrade on the sd card was to big.So i screwed up the deck and did not back up the old files , my mistake so the unit