Hello @zexoni70 

Thank you for posting on the TP-Link Community.

Firstly, I would like to point out that Smart Connect relies on an advanced algorithm that not only automatically determines which band is best for each device, but also constantly monitors the overall status of each device to determine if and when a particular device would benefit from being automatically reassigned to a different band. Visit the following website to understand how Smart Connect works on the routers:

What is Smart Connect

Secondly, the client device, not the router, decides whether to connect to another Wi-Fi network. The router only recommends you stay or change. You could try disabling Smart Connect and splitting it into two different SSIDs (2.4GHz and 5GHz). For example - keep the IoT devices, IP cameras, etc. on the 2.4GHz band and high-bandwidth demanding devices on the 5GHz band.

Regarding the issue you're reporting, can I know the details below? We will check to see if there is anything we can do to improve it.

1. Except for the Samsung Galaxy A71, how about other wireless devices, are they also sticking to the 2.4G network all the time until you turn off the Wi-Fi and then turn it back on?

2. Are all three Archer C80s connected to the same network or do they belong to different networks when you tested the Smart Connect? How about the AX73? If they are all in the same network, can I know how are they connected to each other?

  Dear @Kevin_Z thanks. my home network is configured like this:

ONT ZTE F680 (192.168.1.1) -----> Archer AX73 (Router mode) -----> TL-SG3428X and all my Wired devices are connected to TL-SG3428X including 3 pieces Archer C80 (Access Point mode )

The default getavey is Archer AX73 192.168.0.1 while I assigned each of the Archer C80s fixed IP addresses (192.168.0.11x) and all three C80s are in the same network and connected with a LAN cable in the TL-SG3428X.

This morning I also tried the iPhone 11 and iPhone 13 devices from friends and everything is OK with them and they have no problem switching between 2.4GHz and 5GHz networks and always choose the 5GHz network, while this problem seems to exist only with Samsung phones, because I also have a business Galaxy A50 phone also has that problem!

As I'm working today and I'm not able to test everything, I'll try it over the weekend and I'll write you how everything works, but considering that the iPhone doesn't have that problem, I think it's just a problem with the Samsung phone...

But as I said before Samsung doesn't have that problem when switching to Wi-Fi network from Archer AX73 and that's strange to me and that's why I thought the problem only exists on Archer C80.

Best regards!

@zexoni70 

Completely understand your concerns. I agree that both the C80 and the Samsung Android phones may need to be further analyzed.

Please let me know what you will find out with more tests, and I will also report this issue to the engineering for investigation.

  Hello @Kevin_Z .

My name is Alexandre

after the last update of the C80 (US) I have noticed several strange symptoms.

the first of them and I believe the most critical one is the failure in smart connect, the devices have prioritized the 2.4ghz network instead of the 5ghz network. Thus leaving the bandwidth usage reduced.

another flaw I noticed is that when enabling guest networks. the same connect but do not navigate.

Do you already have any feedback from the development and engineering team?

@Alefurquim1 

Are you saying this issue occurs after you upgrade the C80 firmware to the latest public official version?

Actually, we are providing an early-released version in the following thread, maybe you can upgrade and install this one to monitor the connectivity.

Pre-Released Firmware Supports DoH and IoT Network for Archer C80 is Ready for Trial

But again, I hope I've explained how Smart Connect works on the C80 router in this link, please check it again.

 Hello  @Kevin_Z !

Yes, the issues started to occur after the official update.

The version downloaded via OTA.

Firmware:

1.12.10 Build 230208 Rel.38878n(5553)

Hardware:

Archer C80 1.0

I'll try to upgrade to this pre-release version as offered.

But reinforcing the point that this update reported above, generated problems with smart connect, where 5ghz is not prioritized and visiting networks in both bands do not navigate.

Thank you and I will let you know after the update of the pre version