@malibu66 Since a phone app is the only way to access the divice, the hardware I purchased today could in theory become 'incompatable' with the current version of the app and thus unmanagable. It...

@larkim 1.6.2 is for EU firmware of M4, most likely the other 3 Decos have US firmware

@Runixo Is your network setup like this: modem > switch> Main Deco ↘ Deco 2 ↘ Deco 3

@HelpMee What's your network setup exactly?

@SayeemAhmed X10 as main Deco is clearly not working for you...so use it as satellite Deco instead

@Damiri M4 V3 with M4 V2