@Alexandre. Bought 3 previsously-owned M9's a few days ago... probably not been used for years since their firmware is so outdated :). Also, I bought another set of M9's a month ago and they work...

@Alexandre. Thanks, tried method 2 yesterday, will try method 3 tonight. (Will a factory reset help - if possible somehow)?)

@Kossie Today I switched 2 M5's with 2 M9's (both are satellites). Light is green on the 2 new M9's but they seem to 'stand alone' with no data coming to them and with a wired icon on the app page...

@Alexandre. I have now bought 3 M9's to replace 3 of my M5s (I already have 1 M9 functioning as my main unit and router). How exactly do I replace 3 of the M5s... just unplug the M5s, plug in the M9s...

@David-TP Smart, thanks... I will try that soon... away from home a few days now :)

On my Samsung tv - when choosing a network - only the Deco's 5ghz is visible even though 2.4 AND 5 are set on the Deco? Also on my iPhone I kan only choose one SSID, not two. I used to have two...