Why is my Wi-Fi slow?
Published by Pulse (BroadbandSwitch.uk). Reviewed April 2026 by the UKSpeedTest editorial team led by Dr Alex J Martin-Smith (LinkedIn).
Slow Wi-Fi does not always mean slow broadband. Often the issue is in-home coverage, interference, or too many devices sharing airtime.
Quick checks
- Test near router, then in problem room.
- Compare 2.4 GHz and 5 GHz where available.
- Reduce competing traffic during tests.
Fix sequence
- Improve router placement.
- Use Ethernet for fixed heavy-use devices.
- Add mesh/access points only if needed.
Pulse measures download speed, upload speed, ping and jitter, and grades how your ping holds up when the line is busy.
Related guides
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FAQ
Can Wi-Fi be slow when broadband is fine?
Yes. Your line can be healthy while a distant room still gets weak wireless throughput or unstable latency. Compare a wired test near the router with Wi-Fi in the problem room to see whether the gap is mostly inside the home.
Should I upgrade package before fixing Wi-Fi?
Usually fix placement, band selection, and interference first. Paying for more Mbps rarely fixes a room that cannot hear the router well.
Do extenders always help?
Not always. Repeaters can add hop delay. Mesh or access points with wired backhaul are often more stable when you need whole-home coverage.
Is 5 GHz always better?
Often it is faster at short range, but it can struggle through thick walls compared with 2.4 GHz. Test both bands in the same room rather than assuming one is always best.