Slow Wi-Fi? The Cause May Be the Wrong Frequency Band and One Router Setting
Even with a fast internet plan, devices can run slowly if the router places them on an unsuitable Wi-Fi band. Turning off band steering and checking channel congestion can help.
Technology site Engadget explains that slow wireless internet at home may stem not from the subscription itself but from router settings. Even when a household pays for hundreds of megabits or a gigabit per second, some devices can suffer slow downloads and video buffering because they are connected to an unsuitable Wi-Fi frequency band.
Three bands, three trade-offs
Most routers support the 2.4GHz and 5GHz bands, while newer models add a third, 6GHz. The 2.4GHz band dates to the original Wi-Fi standard of 1997, is still used by many smart home gadgets, and passes through walls better, but it is slower and more prone to interference from other devices. The 5GHz band became mainstream in the 2010s, carries far more data, but handles obstacles worse. The 6GHz band arrived with Wi-Fi 6E and Wi-Fi 7, offering still higher speed with even shorter range.
Band steering
A common culprit is band steering, a feature that merges several bands under one network name (SSID) so devices can pick the most suitable one. In practice, devices may stay on 2.4GHz even when 5GHz is available and strong.
The feature can be disabled in the router's admin page or companion app, under Wi-Fi or Wireless Settings, in an option called Band Steering, Auto-Band Selection or Smart Connect. Separate networks, often with a suffix such as "_5G", then typically appear, and devices must be reconnected. The author notes that 5GHz gives his smartphone and laptop better speeds even with a weak signal, while smart home devices benefit from the range of 2.4GHz. Some ISP-supplied routers do not allow the feature to be turned off.
Channel congestion and MLO
Wi-Fi 7 introduced Multi-Link Operation (MLO), which combines multiple bands, but it requires both a Wi-Fi 7 router and a compatible device, and real-world results are mixed.
When many networks nearby share the same channel, devices compete for airtime, especially in apartment buildings. Congestion can be checked with the Wi-Fi Analyzer app on Android or NetSpot on Windows and macOS. On 2.4GHz, channels 1, 6 and 11 are often recommended. If the 5GHz band suffers frequent dropouts, disabling Dynamic Frequency Selection (DFS) may help, since it uses channels sometimes occupied by weather or military radar.
