Slow internet is not always inevitable. Before contacting your ISP or changing plans, identify the source: line, router, Wi-Fi, device or remote server. Here are twelve fixes ranked by impact.

1. Run an Ethernet test

Connect a computer directly to the router with a network cable. If the speed is much better than over Wi-Fi, the problem is wireless, not the line.

2. Restart the router

A restart forces the router to renegotiate its connection and clear caches. Wait a few minutes before testing again.

3. Move closer to the router

Wi-Fi loses power with distance and walls. For demanding uses, place the router in a central room and raise it.

4. Use the 5 GHz band

The 5 GHz band offers more speed than 2.4 GHz. Use it for computers, TVs and consoles close to the router.

5. Change the Wi-Fi channel

A channel crowded by neighbouring networks reduces speed. In the router settings, choose a less used channel or enable automatic selection.

6. Check the cable and network card

A damaged Cat5e cable or a 100 Mbps card can cap a fiber plan. Use a Cat6 or higher cable and check the negotiated speed.

7. Close bandwidth-hungry apps

Updates, cloud backups, streaming and games can saturate the connection. Close them during the test.

8. Disconnect unnecessary devices

Every connected device shares bandwidth. Turn off Wi-Fi for devices you are not using.

9. Update the router firmware

Updates fix bugs and sometimes improve stability. Check the router interface or your ISP app.

10. Try another test server

A busy server can give a false result. Run the test again with a nearby server at another time.

11. Check your plan and eligibility

Your line may support a faster technology (VDSL2, fiber). Check eligibility and compare plans available at your address.

12. Contact your ISP with evidence

Note your results, the time, connection type and server used. This speeds up diagnosis and helps request an intervention if needed.

Avoid: cheap Wi-Fi repeaters and long or damaged cables. They add losses and make the line look worse than it is.

When should you change your plan?

If your Ethernet speed matches your plan, changing ISP will not fix a Wi-Fi problem. If your line is limited by technology (ADSL far from the exchange, for example), a fiber or 4G/5G plan may help.

Frequently asked questions

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

Run an Ethernet test directly on the router. That tells you whether the problem is the line or the Wi-Fi network.

Does a Wi-Fi repeater improve speed?

It extends coverage but can reduce speed. A mesh system or a wired access point is often more effective.

Does changing DNS improve speed?

DNS does not increase raw bandwidth, but it can speed up name resolution and improve perceived responsiveness.

Why does my speed drop in the evening?

Peak-hour network congestion can reduce speed, especially on ADSL and mobile. Test at other times to confirm.

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