@Mavibya

Hi,  yes, but probably not in the way you’re expecting. Take Deco M5 for example, it is a dual band WiFi router and uses the same SSID/WiFi name for both 2.4ghz and 5ghz. Most of the mobile clients do not support two simultaneous internet connections. So when it connects to Deco, it will use either of two bands, but not at the same time. In other words, it will not improve the internet bandwidth for one connection if that is what you want initially from dual-band connection.

I find the same question here and a user provider a detailed explanation. Maybe it will help.

(Sorry that it is not allowed to put external link here and I have sent it via private message.)

Thank you very much.