Found this on one of the sky forums.
Sky Community forum.
This message was authored by cookiemonsteruk Apr 2021 10:30 PM
@AngelaA122
Some mobile devices only connect to the 2.4ghz wifi band. To seperate the freqs :-
Log onto router and go to wifi
Go to 5ghz and untick synchronise 2.4 and 5
Click on 5ghz ssid and add -5 at the end
Save
Now you have 2 ssids. Log onto the old one (now 2.4) with your kindle
All done at your own risk obviously
