So, I tried updating a HP605. Still the same firmware bug/limitation since day one of V3 firmware. On V2 can have the display turn on with network activity (or have it timed, on or off). On V3 its timed or off (with no tick boxes for PTT and over-air services), so its basically a dead display until a user touches volume or changes channel. Not even a permanantly on option. I find it pretty poor we are at 3.2 and still don't have feature parity with v2....
Its a shame, HP605 is nice hardware with terrible software that renders the display useless, not even caller IDs shown.