@YanAndrew When you have Satellite Decos connected wirelessly to Main Deco, their optimal location is not in rooms where you want best WiFi signal. Taking Study room as an example. I am assuming you...

@HeyItsCarl Try single band WiFi, to see if it helps: enable only 2.4GHz on Guest Network. Try connecting printer to Guest Network. If that does not work, keep single band and change Guest Network...

@Mikestar You can utilize Guest network for that:

@lbuanos What is your smart TV brand name and model?

@ramki_87 1. Smartphone is required, Android or iPhone. 2. Not in AP mode. You would not need to override MAC address if you run your Deco in AP mode. According to TP-link documentation, you can do...

@waqqas31 Main Deco must be connected to ISP Modem/Router with Ethernet cable. "Backhaul" is used to describe connection between Deco units, which is different.