Accurate download speed test
The UK Advertising Standards Authority (ASA) has strict rules about how internet service providers (ISPs) can advertise broadband speeds. My broadband speed is slower than advertised Refer to your routers user guide for setup instructions. Even if your router supports the 5Ghz band, it might not be automatically switched on. A good, modern router will also offer 'dual band', meaning it will transmit two networks simultaneously, allowing you to connect some of your devices to the less congested 5Ghz frequency band.
WiFi devices operate on either 2.4GHz or 5Ghz. Another common cause of WiFi interference can be from items like fluorescent lighting, WiFi video cameras, cordless house phones, microwave ovens, WiFi printers and baby monitors. A modern, good quality router like the BT Smart Hub 2 will perform a WiFi scan when your first set it up, or when you initiate a factory reset.
If your router is on the 2.4GHz band, you would typically select channels 1, 6, or 11. Configuring your router to use a different WiFi channel should fix this type of problem. The default channel that your WiFi router is set to might be the same one as your neighbours, causing interference. The most common source of interference is from other WiFi networks.