I bought this router one month ago and all this time I thought that I was using both dual-band, but when I looked at some wifi analyzer app, where I could not find the 5ghz channel. Though some other people 5ghz appear in the app but not mine, never. I tried different things to find out do I really have the 5ghz ,

first time - I turned off the 5ghz option in both main and guest networks. only the 2.4ghz was running. the network was ok and I was able to surf the web .

second time -  I turned off the 2ghz option in both main and guest networks. while in the app UI  it was showing that the 5Ghz is on and after a second there was no wifi. There was no network name when wanted to connect to the wifi network.

are tp-link making jokes of the customer by telling them that this dual-band while there is only one band. WTF . Did i waste my money? or is this some kind of regional lock?

WTF tp-link are u screwing ur customer. really i do not get this upset and sorry for the abusive word but this totally  a fraud or scam or whatever u want to say.

Guys is there way to unlock the 5Ghz. I am providing a screenshot.