What some people don’t know is that WiFi operates in mostly two frequency bands; the 2.4GHz and 5GHz bands. Because of the vast number of WiFi devices in the wild these days, the 2.4GHz band gets congested quickly and soon your internet starts to feel snail slow. You can get a much better experience by switching to less-used and faster 5GHz band. But only if your WiFi router and your phone supports it.
To use the 5GHz, your WiFi router must have dual-band WiFi support. It Should support IEEE 802.11 b/g/n/ac or WiFi 4 and WiFi 5 on 2.4GHz and 5GHz bands. Dual-band routers have the option of setting the same SSID/WiFi name for both 2.4GHz and 5GHz bands. D-Link calls this “smart connect“. In this case, WiFi devices automatically connect to whatever band is available or is optimum without your involvement.
But if you want to be particular, then you can configure the router to have separate SSIDs for the different WiFi bands to easily identify and connect to them. For instance you can set the 2.4GHz SSID as say DaveWiFi_4 and the 5GHz band as DaveWiFi_5. The SSIDs can share the same password or you can equally set different passwords.
On your smartphone or laptop, you’ll see the separate SSID names. Select the one you appropriately named for 5GHz band and connect to it.
If don’t have access to the router or WiFi network, then you might not have much control over which WiFi frequency band your device connects to.