How to Speed Up Your Wi-Fi: The Fixes That Actually Work (in the Order to Try Them)

CodexFuse Team · 2026-10-27T04:05:00.764Z · 13 min read

Slow Wi-Fi? Work through the free fixes in order — test first, move the router, switch bands, change channels — and learn when the line is the problem.

If you want to know how to speed up wifi at home, start with a test, not a purchase. Most slow Wi-Fi is a placement or congestion problem, not a slow plan — and the free fixes usually do the job. Run an internet speed test first, work through the fixes below in order, and test again after each one.

That way you will know exactly which change helped, instead of changing five things at once and guessing.

This guide follows the order that actually works: measure, restart, move, switch bands, change channels, then — only if the free fixes fall short — spend money. It also tells you how to tell whether the problem is your Wi-Fi at all, or the line coming into your home. If you have never run a test before, our guide to check your internet speed walks through the whole process in under a minute.

How can I speed up my Wi-Fi fast?

The fastest way to speed up your Wi-Fi is to work through the fixes in this order: measure your speed, restart the router, move it to a central spot, switch to the 5 GHz band, change to a quieter channel, and update the firmware. Most homes see the biggest improvement from the first four steps, which are all free and take about half an hour in total. Only spend money on an extender, a mesh system, or a new router after the free fixes have had their chance.

1. Measure your speed in the problem room and next to the router.
2. Restart the router and the device that feels slow.
3. Move the router to a central, open, elevated spot.
4. Switch nearby devices to the 5 GHz band.
5. Change the Wi-Fi channel to the least crowded one.
6. Update the router firmware and remove unknown devices.
7. Plug in the devices that matter most with an Ethernet cable.

Step 0: measure your speed before you change anything

You cannot tell what worked unless you know where you started. Run a speed test in the room where Wi-Fi feels slow, then run the same test standing next to the router, and write both numbers down. Test again after each fix.

If a fix helps, the numbers will show it; if it does nothing, move on to the next one instead of stacking changes blindly.

The comparison that matters most is wired versus wireless. Plug a laptop into the router with an Ethernet cable and test again. If the wired test is fast and the wireless test is slow, the fault is your Wi-Fi.

If the wired test is slow too, the fault is the line or the plan, and no router setting will fix it. Our guide to what counts as a good internet speed explains the benchmarks for streaming, gaming, and working from home, so you can judge whether your numbers are actually bad or just feel bad.

Why is my Wi-Fi so slow?

Slow Wi-Fi almost always comes down to one of four causes: a weak signal, a crowded channel, old hardware, or a slow line. A weak signal means the router is too far away or blocked by walls and furniture. A crowded channel means too many nearby networks are shouting on the same frequency.

Old hardware means the router or its firmware cannot keep up with modern devices. And a slow line means the connection into your home is the bottleneck, not the Wi-Fi at all. The fixes below are ordered so you can rule each cause out in turn.

One more honest point before you start: no single fix comes with a promised speed gain. Every home is different — the walls, the neighbours, the number of devices — so a tip that doubles one person's speed may do nothing for the next. That is exactly why the measure-first rule matters.

Test, change one thing, test again.

Restart the router — and the device

The oldest fix in the book still works, and it costs nothing. Switch the router off completely, leave it off for about a minute, then switch it back on. Tom's Guide lists this as its first tip for making Wi-Fi faster, and Vodacom's free-fixes guide gives the same advice: unplug the router for 30 seconds to clear its memory, which is especially useful for older models.

While it is off, wipe any dust off it with a dry cloth so the fan does not have to work so hard.

Restart the device that feels slow as well. Vodacom points out that sometimes the problem is not the Wi-Fi at all — it is your phone or laptop. Restarting clears temporary data that may be slowing things down.

If the restart fixes it, you are done in two minutes. If it does not, you have ruled out the simplest cause and can move on.

Move the router to the middle of the action

Where the router sits matters more than almost anything else. Wi-Fi signals travel through walls, but the signal is weaker on the other side — and the thicker the wall, the more you lose, as Vodacom's guide explains. Furniture like bookshelves and cupboards can block the signal too.

Tom's Guide gives the same rule: do not hide the router in a closet. Place it centrally in your home, out in the open, and ideally higher up, for example on a shelf.

Keep the router away from things that interfere with it. Microwaves, televisions, fridges, baby monitors, and large metal objects all sit on Vodacom's keep-away list, and Tom's Guide adds TVs and speakers. If your router has external antennas, angle them: antennas send their signal out sideways from the antenna, so a vertical antenna covers the floor it is on, while a horizontal one reaches the floor above.

Try one of each if you need coverage upstairs. This one change — central, elevated, in the open — is the fix that helps the most homes.

Switch to the 5 GHz band for speed, stay on 2.4 GHz for range

Most modern routers broadcast on two bands, 2.4 GHz and 5 GHz, and which one your device uses changes everything. The 5 GHz band is faster and usually less crowded, but it does not stretch as far. The 2.4 GHz band reaches further through walls, but it is slower and shared with far more neighbours.

Tom's Guide puts it plainly: 5 GHz provides a faster connection but will not stretch as far, so you can be selective about which band each device uses.

Vodacom's guide makes the same point from the other side: on a dual-band router, try the 5 GHz band — it is often less congested and faster over short distances. Put the devices that sit near the router and need speed — the work laptop, the streaming TV, the games console — on 5 GHz. Leave the far-away devices, the smart bulbs, and the doorbell on 2.4 GHz, where range matters more than speed.

Change the Wi-Fi channel to a quieter one

Your router talks to your devices on a channel, and if every router on your street is on the same one, they all slow each other down. Vodacom compares it to traffic: if everyone takes the same road, nobody moves. Your router usually picks a channel automatically, but that automatic pick is made once at startup and does not always stay the best choice — the TP-Link community's channel guide notes that auto selection will not adapt as congestion changes through the day.

On the 2.4 GHz band, the choice is narrower than it looks. Only channels 1, 6, and 11 do not overlap with each other, so those are the only three worth using — the TP-Link guide, the Data-Alliance channel guide, and NetSpot all agree on this. Picking a channel in between, like 3 or 4, overlaps with two of the good ones at once and makes interference worse, not better.

Use a free Wi-Fi analyser app to see which of the three is least used near you, then set it manually in the router settings. On the 5 GHz band there are far more channels, so the TP-Link guide recommends 36, 40, 44, or 48 as a starting point — and if all three 2.4 GHz channels are packed, moving your devices to 5 GHz is the better answer anyway.

Update the router's firmware

Your devices need updates, and so does your router. Outdated firmware can cause slow speeds and patchy connections, as Vodacom's guide warns, and Tom's Guide says the same: check that updates are being downloaded as they become available, and if they are not, update as soon as possible and make sure automatic updates are switched on going forward. Log in to the router's admin page — the address and password are usually printed on the sticker on the router itself — and look for a firmware or software update section.

Apply the update, let the router restart, and test your speed again. This is also a good moment to check the router's age: if it is many years old and only supports an early Wi-Fi standard, no firmware update will make it fast.

Secure the network and disconnect devices you do not use

Every device on your network takes a share of the speed, and some of them are not yours. Tom's Guide warns that if your Wi-Fi has no password, neighbours may be using it — and the more devices that access it, the greater the toll on speed. Vodacom's guide makes the same point about the devices you do own: the more connected, the more your speed drops, especially on older or entry-level routers.

Disconnect the smart appliance you never use and the old phone sitting in a drawer.

Check who is connected. Most routers list connected devices in the admin page — anything you do not recognise should be removed, and the password should be changed. If you cannot remember the current password, our guide to find your Wi-Fi password shows where it lives on every device.

When you set the new one, use a long random passphrase — a password generator will make one in a second — and use WPA2 or WPA3 encryption, never the older WEP or WPA standards, which Tom's Guide notes have been cracked.

Plug in the devices that matter most

Wi-Fi is convenient, but a cable is faster and steadier. Both Tom's Guide and Vodacom list Ethernet as one of the best fixes: plug a gaming console, a desktop computer, or a smart TV directly into the router and it stops competing with every wireless device in the house. Tom's Guide puts it simply — if you need guaranteed connectivity, get out the Ethernet cable and the connection will be stable and constant.

You do not need to wire everything. Wire the one or two devices where lag hurts most — the work laptop for video calls, the console for online games — and let everything else stay wireless. That single change also frees up wireless airtime for the devices that cannot be wired, so the whole network feels faster.

When to spend: extender vs mesh

If the free fixes helped everywhere except one room, a Wi-Fi extender is the cheapest answer. It plugs into a wall socket in the dead zone and repeats the signal — Tom's Guide recommends one for exactly that case, a single room that the router cannot reach. The signal from an extender is not as strong as the signal from the router itself, but it is far better than nothing, and it costs much less than a new system.

If the dead zones are everywhere — the upstairs bedroom, the garden office, the far end of the house — a mesh system is the better spend. Mesh nodes talk to each other and hand your devices between them as you move around, which is why they suit larger homes. As one real-world example in the thamhiemmekong guide shows, a graphic designer whose attic office dropped to 12 Mbps tried a cheap extender first and it kept dropping, then switched to a tri-band mesh system with a node on the landing — and his speeds reached 280 Mbps within an hour.

The lesson is not the number, which will differ in your home, but the order: extender for one room, mesh for the whole house.

When the problem is the line, not the Wi-Fi

If the wired test from Step 0 is slow, stop fixing the Wi-Fi — the problem is upstream. Restart the modem as well as the router, then check whether your neighbours have the same problem. Tom's Guide suggests asking them: if they do, it is an area fault, not your home.

Call your provider, describe the wired test result, and ask them to check the line and send a signal refresh.

Only now should you think about spending on a faster plan or a new router. A faster plan helps only if the line is the bottleneck and your current plan is genuinely too slow for your household. A new router helps only if the old one cannot handle your devices — Tom's Guide notes that a Wi-Fi 6 router handles more devices at once, which matters in a house full of phones, laptops, and smart gadgets.

Either way, buy the upgrade because the tests told you to, not because a slow evening made you guess.

The fix ladder

Here is the whole guide in one table, in the order to try it. Work down from the top, test after each step, and stop when the Wi-Fi is fast enough.

Sources

• Tom's Guide — "How to make Wi-Fi faster — 13 tips to get faster internet" — tomsguide.com/features/how-to-make-wifi-faster (fetched 2026-10-27)
• Vodacom Now — "How to Improve Your WiFi Speed Without Spending a Cent" — now.vodacom.co.za (published 27 August 2025, fetched 2026-10-27)
• TP-Link Community — "Best Wi-Fi channel settings for reducing interference?" — community.tp-link.com (fetched 2026-10-27)
• Data-Alliance — "Best WiFi Channels: 2.4, 5 & 6 GHz Channel Guide" — data-alliance.net (fetched 2026-10-27)
• MakeUseOf — "I changed one 2.4GHz Wi-Fi setting and my connection got much more stable" — makeuseof.com (fetched 2026-10-27)
• NetSpot — "Wi-Fi Channels: Avoid Interference and Boost Performance" — netspotapp.com (fetched 2026-10-27)

Frequently asked questions

Why is my Wi-Fi so slow all of a sudden?

Start with a restart of the router and the slow device — a stuck connection or a memory glitch is the most common sudden cause. If that does not help, run a wired test at the router: fast wired and slow wireless means the Wi-Fi is at fault, while slow wired means the line or provider is. Also ask a neighbour whether theirs is slow too, which points to an area fault rather than your home.

Is 2.4 GHz or 5 GHz faster?

5 GHz is faster over short distances and usually less crowded, while 2.4 GHz reaches further through walls but is slower. Put the devices near the router that need speed — streaming, gaming, video calls — on 5 GHz, and leave far-away devices and smart-home gadgets on 2.4 GHz, where range matters more than speed.

What is the best Wi-Fi channel?

On the 2.4 GHz band, use channel 1, 6, or 11 — whichever of the three is least used near you — because those are the only channels that do not overlap with each other. Check with a free Wi-Fi analyser app before you pick. On the 5 GHz band there are many more channels, so 36, 40, 44, or 48 are good starting points, and if all three 2.4 GHz channels are packed, moving devices to 5 GHz is the better answer.

Will restarting my router make Wi-Fi faster?

Sometimes. Restarting clears the router's memory and drops stuck connections, which fixes the slowdowns that build up over weeks of uptime — especially on older models. It will not fix a bad router position, a crowded channel, or a slow line, so if the restart does not help, work through the rest of the fixes in order instead of restarting again.

Should I buy a Wi-Fi extender or a mesh system?

Buy an extender if only one room is dead — it is cheaper and solves a single coverage gap. Buy a mesh system if the dead zones cover the whole home, since mesh nodes hand your devices between them as you move around. Try the free fixes first either way: many homes that were about to buy hardware find the router move or the band switch was enough.