I just found out Deco can't split the bands into two separate WiFi networks. This is really unfortunate and until this feature gets added I have to go with a different mesh system.

  @David-TP uugh . . .  loving every other aspect of my XE75 Pro mesh net but this may be a deal-breaker. Lack of visibility of devices across a guest network may be the key issue of not having separate 2.4/5 for the older tech devices. Will run some tests, but will hate to have to return these due to what feels like an oversight. Add me to the +1 list please.

  @David-TP Adding my support for this request. Customer choice/control would be preferable for factors like this. Some devices I'm happy to roam and others I want to lock to a band. 

  @David-TP 

TP Link definitely needs seperate 2.4 & 5ghz connections. My IRobot 7 & my ecobee thermostat both require 2.4 only

and my other devices need a dedicated 5ghz. When are you going to step up to the demand TP Link????

  @David-TP 

Unfortunately, I'm contemplating returning the 2 TP-link XE75 mesh units because of this...

.

We live in a concrete 3-bedroom apartment in Hong Kong. Our fibre provider equipment came via backdoor stairs close to the laundry room, thus our main XE75 mesh is in the laundry room. We have a second XE75 mesh in the living room.

When we are in 2 of the bedrooms, the iPhone 11 and iPhone 14 are connected via 5Ghz to the XE75 living room mesh (Channel 40, 80Mhz). However, the bedroom furthest away, because it has a line of sight through the window to the laundry room, can only connect to the XE75 there but at 2.4 GHz frequency (Channel 6, 20 MHz). Unfortunately, we also use this bedroom for video production with the Macbook Pro 2021 16" and the iPhones, but they can only connect to 2.4 GHz with only one SSID option, so the speed is a big drop. 

  @David-TP 

I am a little shocked at how gimped the firmware has made this device. My ubiquiti Amplifi HD had the ability to support 3 SSID's on the head unit. I could also create an special SSID on each satellite unit. That device is well over 4 years old and the features far outshine the TP-Link deco system. You also 

I will be returning this for the Asus ET8 which can already support my multi SSID needs out of the box.

I come from the IT and Software Development world. I know this is not a hardware limitation here. It is straight up a software thing that it would appear TP Link is ignoring given the request was made a number of months ago and no one from the company has responded.

Better than this, could you implement an option to choose a default band (2.4ghz or 5ghz) for each device?
That would be fantastic