Its just a matter of selecting the SSID of that ends in _5GHz .
5GHz is faster but the signal can not travel as far as 2.4GHz and is more prone to interference from obstructions like walls.
Thanks for that I have my modem in a central place no brick walls interfering with signal however the 5ghz seems to drop-out as you say its not a strong signal
Thanks for that I have my modem in a central place no brick walls interfering with signal
Its not just brick walls that will interfere and any types of walls or obstructions.
Is the modem sitting on the floor? If so it may be being obstructed by furniture. Try putting it higher temporarily, even if its just on a seat, and see if that makes a difference.