@14paavang You can configure Main Network in Deco app to brodcast 5GHz only, that will force every device connect on 5GHz.

@Bjebeje Great! Will keep that solution in mind when someone else has issues with M9 Plus firmware 1.2 update. Now your Deco M9 Plus must be on firmware 1.6. You can check that in Update Deco page....

@Bjebeje Just in case, power off/on all M9 Plus and check again in Deco app. If Main Deco M9 Plus continues to stay on firmware 1.2, do the following: Promote one of updated Satellite Deco M9 Plus to...

@Bjebeje V2 means "Hardware version V2." You can double check you have the right hardware version by inspecting the label on the bottom of M9 Plus. See How to find the hardware version on a TP-Link...

@Bjebeje As you can see from screenshot, your M9 Plus Deco units have firmware 1.2. You can also deduct it were released in 2019.08.09, which is quite a long time ago. This firmware is so old, Deco...

@michael_hoste You can use Ethernet ports of Satellite Deco to hardwire devices to it. One of my Satellite Deco has PC wired to it, another - Smart TV. If you want to hardwire more devices to...