My S20 FE always connect to 2.4G band even if the 5G signal is clearly strong when I activate both bands. I can not change wifi setting to 5G only because my IoT devices must use 2.4G band. I have tri

Deco supports disabling 2.4GHz and 5GHz separately under the Main/Guest/IOT networks. As for separate SSIDs over 2.4GHz and 5GHz, it might not be completed via a single network, But you could set the