I just received a Droid Razr Maxx this week, and the System version remains the older 6.12.173.XT912.Verizon.en.US. I am particularly interested in the upgrade, as I noticed one of the fixes is to have better 4G indication, as I'm trying to sort out if 4G is working at all on the device, it pretty much always indicates 3G. I called phone support, and they said that they can see the SIM, and the phone is activated, etc., on their system, but that I'm in a 4G "Extended" area, which long discussion short, apparently means it-might-work, it-might-not. So I'll probably take it to the local Verizon store to see for sure. Have to find a regular 4G area to check it out.