Step 1: Diagnose before you fix

Don't guess — measure. Run a speed test right now and note your download speed, upload speed, ping, and jitter. Then plug in via Ethernet and run it again. The gap between the two tests tells you exactly whether the problem is your WiFi or your ISP plan. If Ethernet is also slow, it's your ISP. If only WiFi is slow, read on.

Quick Fixes (Under 2 Minutes)

Fix 1: Restart your router (not just your device)

Power-cycling the router flushes its memory, renews DHCP leases, and clears many transient congestion states. Unplug the power for 30 seconds — don't just press the reset button, which often factory-resets settings. This alone fixes around 30% of "slow WiFi" complaints.

Fix 2: Move closer to the router

WiFi signal strength drops with the square of distance. At 10 metres, you have one-quarter the signal of 5 metres. If your test improves significantly when you move close to the router, distance and walls are the problem — not the router or your plan.

Fix 3: Switch from 2.4 GHz to 5 GHz

Most modern routers broadcast two networks — the 2.4 GHz band (long range, slower, crowded) and the 5 GHz band (shorter range, much faster). If your device can see a "NetworkName_5G" or "NetworkName_5GHz" option, connect to it. Speed often doubles or triples instantly.

Fix 4: Disconnect unused devices

Every device on your network competes for bandwidth — even when idle, smart bulbs and IoT devices send background traffic. Go into your router's admin panel (usually 192.168.1.1 or 192.168.0.1) and check how many clients are connected. Disconnecting unused devices can free up significant capacity.

Router-Level Fixes (5–15 Minutes)

Fix 5: Update your router firmware

Router manufacturers regularly release firmware with performance improvements and security patches. Log into your router admin panel and check for updates. Many routers now auto-update, but older models require manual updates. This step is especially impactful on routers older than 3 years.

Fix 6: Change your WiFi channel

In densely populated areas, all your neighbours are on the same channels you are — causing interference that tanks throughput. Use a WiFi analyser app (WiFi Analyzer on Android, Airport Utility on iOS) to see which channels are least congested. On 2.4 GHz, only channels 1, 6, and 11 are non-overlapping. On 5 GHz, you have 20+ options. See our router optimization guide for step-by-step channel changing instructions.

Fix 7: Enable or fix QoS (Quality of Service)

QoS prioritises certain types of traffic — for instance, video calls over background downloads. If someone on your network is running a torrent while you're on a Zoom call, QoS can prevent the call from stuttering. Enable it in your router settings and set video calling or gaming as high priority.

Fix 8: Reposition your router

A router tucked behind a TV or inside a cabinet loses 30–50% of its effective range. Place it centrally, elevated, away from walls and metal objects. Our router placement guide has exact positioning rules backed by physics. This one change alone can double your signal across your home.

Fix 9: Eliminate interference sources

Microwaves, baby monitors, Bluetooth devices, and some cordless phones all broadcast on the 2.4 GHz spectrum. If your WiFi slows every time someone uses the microwave, that's your problem. Moving to the 5 GHz band or enabling 5 GHz-only mode on your router eliminates this entirely.

Network-Level Fixes (15–30 Minutes)

Fix 10: Change your DNS server

Your ISP's default DNS can be slow. Switching to Cloudflare (1.1.1.1) or Google (8.8.8.8) reduces the time it takes to resolve domain names — noticeably speeding up page load times even on the same internet connection. Change it in your router settings so all devices benefit instantly.

Fix 11: Check for network congestion by time of day

Internet speeds often drop 30–50% during evening peak hours (7–11 PM) when your entire neighbourhood is online. Run the test at 8 AM and again at 9 PM. If the difference is huge, your ISP is congested at peak times — this is a service quality issue you can raise with them. Read more about why internet slows down.

Fix 12: Disable VPN (or switch protocol)

VPNs route all your traffic through an additional server, adding 20–60% latency depending on the provider and protocol. If you're on a VPN, try disabling it for a speed comparison. If you must use a VPN, WireGuard protocol is significantly faster than OpenVPN. See our VPN speed impact test.

Hardware Fixes (If Nothing Else Works)

Fix 13: Add a WiFi extender or mesh node

If your problem is coverage (works fine near router, drops far away), a WiFi extender (~$30–50) or mesh node (~$100–200) extends your network. Mesh systems are better — they create a seamless single network. Extenders create a second network with half the bandwidth. See our extender vs mesh comparison.

Fix 14: Upgrade your router

Routers older than 4–5 years may not support WiFi 5 (802.11ac) or WiFi 6 (802.11ax). A modern WiFi 6 router with MU-MIMO can handle 10× more simultaneous devices without degradation. If you're on a gigabit fiber plan and getting 50 Mbps wirelessly, an old router is probably the bottleneck.

Fix 15: Run Ethernet to your most important device

If everything else fails or you need consistently perfect connectivity, nothing beats a physical cable. A single Cat 6 Ethernet cable from router to your gaming PC or work desk eliminates every WiFi variable instantly. This is often the fastest, cheapest, and most permanent solution. See our WiFi vs Ethernet comparison for the full numbers.

Which fix worked?

After applying any fix, run another speed test to confirm the improvement. Compare download, upload, ping and jitter before and after. If your speed has improved, you've found the culprit. If it hasn't, move to the next fix on the list.

▶ Run your speed test now and diagnose the problem

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