2: Device speed and connection
If your wi-fi feels sluggish, it could be due to the device you are using. Typically the newer your equipment, the faster the wireless speed it will support - a smartphone from 2013 can handle around half the wi-fi speeds of a modern phone.
Test your speed using the My BT app, where you can find the ‘Speed to your Hub’ and ‘Speed to your Device.’
Different things can cause a computer to slow down, which can give the impression that your broadband is slow. This includes: Running lots of programs at once, insufficient RAM, web browser add-ons and too many startup programs.