No issue, as long as the gateway is the same. 2.4ghz device also can see 5ghz device, and is separate ssid.

iOS will prompt a warning if 6Ghz is different name with 2.4/5Ghz as well

Best practice nowadays is to use same name

Same name as in like ssid is identical? Or like abc_5G and abc_6G can also? Cos mine is abc_2.4G and abc_5G default by router

mean both same or enable the smart connect at router? Problem is i don wan my 5ghz device connecting to 2.4g.

Ohh, i prefer to control which connect 2.4g which connect 5g lol. Asus do have smart connect with band steering bla bla. Asus don have IoT thingy i think lol. My uncle sharing my wifi also they connect 2.4g, ancient phone so yeah, better just separate lol

And this is one big problem with Tp-link or their subsidiary Mercusys devices that they make.

Too many versions of a device with slight alterations due to hardware/chips supply.

And I took one 2 days to fully compared the different hardware versions of x20 and x50, reasons being ,I'm interested with the IoT network, signal source, connection preference . And lately they added ECO mode to it but only on V3 and above for x20 deco.

Imagine a normal user, they won't even ask dealer/vendor about this as they don't even know in the first place. And by the time you get it and open it up, is already too late to realize about the firmware differences, hopefully those features will come to v2 and v1.

Deco x10 is the worst..totally cut off from future supports for now

From what I've gathered online, TP-link got many factories all over the world, chips supply is not consistent or they never keep stock on hold for production.
Also due to certain region wifi power limit regulations, they need to adjust base on that region. So in the end, come out with many types of hardware revisions.

Yes, I even read some complained about Tapo cameras with the later versions had bad microphone sound, but the older ones is better mic but slower processing hardware.

Hopefully they can at least standardize it more in the future even with different hardwares.

Feels bad for those early buyers of Deco X10, device is great, but the lack of firmware update support is terrible. If they can't handle it, why don't just release the source code and allow the community to cook up a good customized firmware of decos.

x50 and above all using homeshield..so unless you want free homecare basic, you need to change the main node x20, but then it seems like intentionally bottle necking your hardware.

have you try changing tp link region , europe,global,us and some other foreign country in english? i notice for example , x20 deco has different versions for each country despite same hardware versions. you can try playing around with that

Yes, wasted a lot but that's the only way, for networking features and functions, really depends on which one you using for the main node.

Check with this link, different region , different firmware versions, also try to take note for hardware version.
https://www.tp-link.com/my/choose-your-location/

Hard to say , as I have yet to test out on my own neither do I own a pair of deco mesh. but if it works , then good choice, get to enjoy homecare, same speed and coverage, with 6ghz still can turn on.

but that doesn't means the x20 main node will be able to emit 6gnz.

afaik, bandsteering or smart connect only applies for 2.4ghz+5ghz, for 6ghz they put it under MLO, but only on Wifi 7.

not sure if Wifi6e router/mesh smart connect includes 6ghz as well or not?

by default, all tapo kasa is under tp link, should be compatible .

Yes it is, back when I was using Mercusys Halo, it showed the same thing as well.

So I guess somehow it is the same for the mentioned above that when you joined a network, double notifications .

Just reselect the Wifi which has better signal strength as indicated in the list..that should be fine as it means is closer to the source.

I'm using IoT network now ,so far so good...

Though I cant seem to find any difference with using main network..but nevermind...just leave it as it is.

I'm using IoT network now ,so far so good...

Though I cant seem to find any difference with using main network..but nevermind...just leave it as it is.

Homeshield?
All premium, so I didn't bothered with it, no kids, so no need supervision, surf at your own risk.  

X50 + X20

wifi access control is blacklist + whitelist mode . this year should be coming out. They even have eco mode for deco x50/x55 now..But after add in deco x20, the eco mode is gone because they haven't release the firmware yet for x20 malaysia..V4 has it.

Just turn off the notification, because I rename all connected device individually to check any outsiders.

Maybe you can send in a support ticket at tp link forums to report about that issue.

Check here to see if preferred signal source feature available for your device, if not, wait for the firmware update, should be coming soon.

Not much of a use especially for devices like mobiles that you need it to roam from one point to another point, this feature benefits IoT devices, or device that you won't move around like laptops/desktops or TVs. The only good thing about it, is that you can set your mobile devices to keep connecting to the 5Ghz mode.
https://www.tp-link.com/fi/support/faq/3480/

Yes, M4 deco is ac and supports up to WPA2 only, imo, WPA2 is enough, the better the security authentication method, the more power is needed to decrypt the password, hence why some devices (even those that supports WPA3) will face disconnection after some time.

Like one of my friend, who didn't know that his router turned on WPA3 by default, usually on first try, his devices can connect to the router without issue, by night time, the next day, everything is disconnected, and trying to connect back the WiFi will keep failing, initially he thought his router was defective and even called tech support to check, the support keep telling him to reset and reset port, but I came to help him, and set it back to WPA2, working until today, didn't need to restart at all.

It will come, but only they themselves can tell.

IoT devices like Tapo Cams/ LED bulbs, I didn't even change anything, just put it on auto for all signal and band selection. Because it can only go up to 2.4Ghz, no point changing it anyway. The only thing that I can think off is that I can set it to connect to another node.

Maybe different hardware revisions?

I think is due to you using the main node XE75,is causing the app detect your location in MY.

Meanwhile global and US website has 1.5.3 for Deco X20 V1.
If you are daring enough, can always download the file, and update it manually through the web browser.