I tried your device upgrade and it works fine on the 8910, thanks.
I uplodaed the Anthem AVM factory remote read via IR 6.20, located here:
https://www.hifi-remote.com/forums/dload ... le_id=3250
Did IR identify an rdf to match the remote? (What is it?) or do you have only a "Raw Data tab?
The .ir file contains five devices OEM: 0040-0044. 0040 = Main, 0041 = Zone2, 0042=Zone3. The file also contains one protocol. The pwer commands are mapped to Power (on) and Last(off) in the .ir file.
Looks like OEM 0043 has the same on/off EFC as 0040 (Main)
OEM 0044 has the same on/off EFC as 0042 (Zone3).
I'm not sure why we have five devices with dups for main and Z3?
Also it's interesting, when I learned the cmds, it only shows OBC whereas when I read the factory remote it provides EFCs.
I will begin looking at the factory remote this week for use with Z2, Z3 and let you know what parts of the mian zone are carried over to the Zones 2 & 3. Perhaps the uploaded factory file will tell you enough info too.