@Alexandre. Ok - I should have specified that but it never even occurred to me. 2.4 GHz has been the "default" for WiFi for me in the house and I haven't even tried 5 GHz in a good while. As I said...

@Alexandre. Ok thanks - I never use the 5 GHz band - its always the 2.4 one. The 5 GHz never gave great coverage

@Alexandre. Thanks again Alexandre - you've given me a good few options there and I'll run those few tests and see what results I get. When testing the WiFi from the Main Deco with the Ookla app...

@Alexandre. Thanks Alexandre for taking the time in putting together your reply – some great information there. Quote: “If you see 95Mbps up, you have gigabit down/100Mbps up Internet from your ISP....

I have an M5 as the main Deco connected to the router and a 4R in the hall downstairs (about 40 feet away) and another 4R upstairs in the main bedroom. The house has concrete slab 1st floor. I have...