Slow Internet? A Step-by-Step Troubleshooting Guide

Work from simple to complex

When the internet feels slow, it is tempting to call the provider straight away or to buy a faster plan. In practice, a large share of slow-internet problems come from something inside the home, and a calm, ordered check will find it faster than guessing. The steps below start with the easiest and least disruptive checks and move gradually towards the ones that need your provider's help. Change only one thing at a time and test after each change, so you know what made the difference.

Step 1: Describe the problem precisely

Write down what is slow, where and when. Different symptoms point to different causes.

Everything is slow on every device: suggests the router, the line or the plan.
Only one device is slow: suggests that device or its wireless hardware.
Only one room is slow: suggests Wi-Fi coverage.
Only one website or app is slow: suggests the site, not your connection.
Slow only at certain hours: suggests congestion or competing use.
Calls and games are choppy but downloads are fine: suggests delay, jitter or packet loss.

Step 2: Take a baseline measurement

Run a speed test and note download, upload and ping. Run it more than once, ideally against two different servers. Record the date, time, device and whether you used Wi-Fi or a cable. This baseline becomes your reference for everything that follows.

Step 3: Check whether it is just one site or app

Open several unrelated websites and apps. If only one is slow, the issue is probably on its side, or in how it is built, and not with your connection. Our guide on website speed explains why a slow page does not always mean a slow connection.

Step 4: Reduce what else is using the connection

Pause cloud sync, backups, game downloads and software updates.
Close streaming apps on televisions and tablets that nobody is watching.
Ask others in the household to pause heavy use, then test again.
Close extra browser tabs, especially ones that auto-refresh.

If the result jumps once other use stops, you have found a demand problem rather than a fault. You may need to schedule heavy tasks for quiet times, use quality controls on the router, or reconsider your plan.

Step 5: Isolate the device

Test a second device in the same spot. If the second device is much faster, the first has a device-level issue. Restart it, update its software, switch off any power saving that limits wireless performance, and remove browser extensions you do not need. Try a different browser. If a device keeps underperforming, its wireless hardware may simply be limited.

Step 6: Test by cable

Connect a computer directly to the router with a cable and run the test again.

If the cable result is good and Wi-Fi is poor, your wireless setup is the bottleneck.
If the cable result is also poor, the router, the home cabling or the line is more likely to be involved.

This one comparison separates the two biggest groups of causes better than any other test.

Step 7: Improve the Wi-Fi

Move closer to the router and test again, to see how much distance matters.
Improve router placement: central, raised and in the open.
Try the other band, using 5 GHz for nearby devices and 2.4 GHz for far ones.
Try a different channel if neighbouring networks crowd yours.
Consider an access point or mesh unit for rooms the router cannot reach.

Our router placement guide goes into each of these in detail.

Step 8: Restart in the right order

Restarting clears temporary faults. Switch off the router, wait for a short while, then switch it on and allow it to fully start before testing. If you also have a separate modem or provider unit, restart that first and let it settle before the router. Do not repeat this constantly. If you need to restart every day, something deeper is wrong.

Step 9: Inspect the physical setup

Check that cables are firmly seated and not bent sharply or visibly damaged.
Look for loose connectors, damaged sockets and old splitters.
Make sure the router has airflow and is not overheating in a closed space.
Try a different network cable and port if you can.

Step 10: Check for security and software problems

Unknown devices on your network use capacity and can be a security concern. Review the list of connected devices in your router settings and change the Wi-Fi password if anything looks unfamiliar. Scan your computers for unwanted software that may be using the connection in the background.

Step 11: Compare against quiet hours

If wired tests are fine at quiet hours and poor in the evening, congestion on a shared part of the network may be involved. Keep a record over several days, with times and results.

Step 12: Contact your provider with evidence

If a wired test, with other use paused and the router restarted, is still consistently poor, it is time to contact your provider. Be ready with:

Your dated speed test results, including upload and ping.
Whether the tests were by cable or Wi-Fi, and the device used.
The steps you have already tried.
The times when the problem is worst.

Ask for a reference number for the complaint, and ask what the next step and expected timeframe are. If the issue is not resolved, check the complaint process published by the telecom regulator.

Key takeaways

Describe the problem, measure it, then change one thing at a time.
A wired test separates Wi-Fi problems from line or router problems.
Background use, device limits and Wi-Fi are the most common causes.
Take dated evidence to your provider.

Frequently asked questions

What is the first thing to check when internet is slow?

Run a speed test and note whether the problem affects every device or only one. Then pause background downloads and test again, since competing use is a very common cause.

How often should I restart my router?

A restart now and then is fine for clearing temporary glitches. If you need to restart it daily to keep things working, something deeper needs attention, such as the router, cabling or line.

How do I know if it is my Wi-Fi or my provider?

Test with a device connected by cable to the router. If the wired result is good and Wi-Fi is poor, the wireless setup is the issue. If both are poor, involve your provider.

What should I tell my provider?

Share dated test results for download, upload and ping, say whether you used a cable or Wi-Fi, list the steps you have tried and note the hours when the problem is worst.