My Billion BiPAC 7800VDOX Dual Band Wireless VoIP ADSL2+ Router has two bands: 2.4GHz and 5GHz. and is wirelessly connected to my laptop OMEN by HP Laptop PC 17-w007tx. It always shows as connected via 5GHz band only. My laptop also shows 5GHz band only in the list of available networks; 2.4GH does not show up in the list of available networks. It is not so in my other laptop which is also connected to the same router and that laptop shows both the bands in the list of available networks. Thus, I can choose to connect to any of the two bands as per my choice. I have tested the router and it is working perfectly; there is nothing wrong with it.
I wonder what can possibly be wrong in my OMEN laptop that it does not show both the bands which it should. At times, when I click to open the list of available networks, 2.4GHz may appear momentarily only and then disappears; thus I can not choose it for connection.
I would appreciate any help to resolve this issue so that my OMEN laptop shows both the bands in the list of available networks so as to choose either one for connection.