Slow Wi-Fi at Home? 9 Practical Fixes That Actually Work
"My internet is slow" is one of the most common complaints, and in many homes the internet plan isn't the problem at all. The weak link is usually the last few metres: the wireless signal between your router and your device. The good news is that most Wi-Fi problems can be reduced with free changes. Work through these nine fixes in order.
1. Measure first, with a cable if possible
Run a speed test on a laptop plugged directly into the router with an Ethernet cable. Compare that with the same test over Wi-Fi. If the wired result matches your plan but Wi-Fi is far lower, the plan is fine and the wireless side needs work. If even the wired result is poor, restart the modem and then contact your ISP. Test a few times at different hours, since results fluctuate.
2. Move the router
Wi-Fi is radio, and radio is absorbed by walls, floors, water and metal. Place the router in a central, elevated, open spot, not on the floor, in a cupboard, behind the TV or in a corner of the house. Keep it away from microwaves, cordless phone bases and large metal objects. Moving a router just a few metres often improves speed in distant rooms more than any setting.
3. Use the 5 GHz band (and know why)
Most modern routers broadcast two bands. 2.4 GHz travels farther and penetrates walls better but is slower and crowded, since neighbours' routers, Bluetooth devices and microwaves share it. 5 GHz is faster with less interference but has shorter range. Connect devices that are close to the router to 5 GHz, and keep 2.4 GHz for far-away rooms and smart-home gadgets. Newer routers also support 6 GHz (Wi-Fi 6E and 7) for very fast, uncongested links at short range.
4. Change the Wi-Fi channel
If many neighbouring networks use the same channel, they compete for airtime. On 2.4 GHz, only channels 1, 6 and 11 don't overlap, so pick the least busy of those. A free Wi-Fi analyser app on your phone shows which channels are crowded. On 5 GHz there are many more channels, so congestion is less of an issue.
5. Update the router's firmware
Manufacturers release updates that fix bugs, improve stability and patch security holes. Log into the router's admin page and check for updates, or enable automatic updates if available. If your router is more than five to seven years old and no longer receives updates, consider replacing it.
6. Reduce what is using your bandwidth
A single device doing a large cloud backup, game download or 4K stream can slow everyone else. Check the connected-devices list in your router app for anything unfamiliar. Enable QoS (Quality of Service) if the router offers it, to prioritise video calls and gaming over bulk downloads.
7. Secure the network
An open or weakly protected network invites freeloaders. Use WPA2 or WPA3 with a long, unique passphrase, never WEP or an open network. If you see devices you don't recognise, change the Wi-Fi password and the router's admin password. Disable WPS, which has well-known weaknesses.
8. Extend coverage the right way
Cheap plug-in repeaters often halve the speed because they must receive and retransmit on the same radio. Better options, in order:
- Wired access point: run an Ethernet cable to a second access point. This gives the best performance.
- Mesh system: multiple nodes that act as one network. Choose a model with a dedicated backhaul band or Ethernet backhaul.
- Powerline adapters: use your home's electrical wiring. Results depend on wiring quality.
9. Upgrade old hardware
An old router limits a new plan. If you pay for 300 Mbps but the router only supports Wi-Fi 4, you won't reach it wirelessly. Equally, an old laptop or phone with an outdated Wi-Fi chip can't use the router's full speed. For a modern household, look for Wi-Fi 6 or newer. The device standard and the router standard must both support the feature to benefit.
A quick checklist
- Restart the router and modem.
- Test wired versus wireless.
- Reposition the router centrally and high.
- Prefer 5 GHz near the router.
- Choose a clear channel.
- Update firmware.
- Check for bandwidth-hungry devices.
- Use strong WPA2/WPA3 security.
- Add a wired access point or mesh if rooms still have weak signal.
When it really is the ISP
If wired speed is consistently well below what you pay for, note the dates, times and results, and contact your provider with that evidence. Intermittent drops at the same time each evening can indicate local congestion that only the ISP can address. Otherwise, most households find that two or three of the free fixes above make a noticeable difference.