Hello, i have a problem that when router is on idle or light browsing, it stay connected only on one Band, B3, or B20, depends, with poor speeds and lag. But i notice that if i put something heavy to download, its going to connected to multiplie Bands at the same time, B3,B7,B1 and B20, but only when doing a heavy test or downloading a game.

Band is on Auto mode, even if a mannualy select wich band i want, it behaves the same, only connects to one band, this did not happened with my last ZTE 888Ultra, what is going on with this? Is this a Bug o normal behavor?