@Kevin_Z I've sent a mail but there is no response. The mail has been sent previous week to support.ro@tp-link.com

@Kevin_Z I mean that the WiFi network even does not appear in the list. All my IoT devices are currently offline. The only 5G devices can connect to WiFi using 5G network.

@Kevin_Z Hi there. How R U? I rest my case with all workarounds found in the internet (a.k.a firmware upgrade, restart, settings changes and so on). The 2.4G WiFi network does not work on the router...