I see you mention the authentication id, I think you refer to menu 2.7.2? I have always wondered how the device cares about what you enter in there. I usually use the extension number as Auth username and just enter 12345678 for the auth password . But you don't get asked to enter these in the app. I enter MAC address in auth number field in 5.2.24
Then on the app I enter system IP address and I think it should just register? I am never asked for a user ID on the app, so I guess it doesn't care what you enter for the auth password in 2.7.2?

PS thanks for confirming that the S5 isn't compatible!


Mike