When to call your internet provider, and what to tell them

Call your internet provider when the problem is still there with a device right next to the router or on a cable, after you have restarted the router and checked your own devices. If it only happens in some rooms or on one device, it is usually your Wi-Fi, not their line. When you do call, give them dates, times, test results and what you have already tried.

First, work out whose problem it is

Most "slow internet" has one of two causes: something inside your home, like weak Wi-Fi or one busy device, or something on the provider's side, like a line fault or congestion. Your provider can only fix the second. Working out which one it is saves you time on the phone.

A quick way to split them:

1. Test next to the router. Stand in the same room as the router, or plug a laptop in with a cable, and run a speed test.
2. Test in the problem room. Run the same test where the internet feels slow.
3. Compare. If it is fine next to the router but bad in the room, the issue is Wi-Fi coverage. If it is bad next to the router too, it is more likely the line or the provider.

Our step-by-step guide on why your internet is slow goes deeper into each check.

Signs it is time to call your internet provider

• Speed is far below your plan even with a cable, at several times of day.
• The connection drops completely, and the router's internet light goes off or changes colour.
• Ping is high or packets are lost before your data even leaves the provider's network.
• The problem started suddenly and nothing changed in your home.
• Neighbours with the same provider have the same issue.
• There is visible damage to the line, the socket or a street cabinet.

Signs it is probably not them

• Only one room or one floor is slow.
• Only one device is slow, while others are fine.
• It is slow only when someone is downloading or streaming heavily at home.
• Speed tests look fine, but one particular app or game is slow.

In those cases, look at router placement, Wi-Fi channels or the device itself before you call your internet provider.

What to do before you call

1. Restart the router. Turn it off at the plug, wait about thirty seconds, and turn it on. Many support calls start with this, so doing it first saves time.
2. Check for an outage. Many providers show service status on their website or app.
3. Run tests at different times. Morning, afternoon and evening. Save the results. Our guide on how to run a speed test explains how to get honest numbers.
4. Test with a cable if you can. It takes Wi-Fi out of the picture.
5. Run a traceroute. If delay starts in the provider's network, it is good evidence. See ping and traceroute explained.
6. Note the router lights. Write down which lights are on, off or flashing, and their colours.

What to tell them

Be specific. A clear, short summary gets you past the scripted questions faster. Include:

• What happens: "Speed drops to a fraction of my plan every evening" or "the connection drops several times a day".
• When it started, and whether it is constant or at certain times.
• Your test results: speed, ping and any packet loss, with dates and times.
• Where you tested: next to the router or on a cable, not just from the bedroom.
• What you tried: router restart, a different device, a cable, checking the socket.
• Router lights: what they show when the problem happens.

What to ask for

• A line test from their side.
• A check for faults or congestion in your area.
• A replacement router, if yours is old or faulty.
• An engineer visit, if the tests point to the line.
• A reference number for the call, so you can follow up.

Calling your mobile provider instead?

The same approach works for mobile signal and data. Note the places and times where it is bad, your signal strength in dBm, network type and, if possible, the cell ID. Our guide on why a signal history helps when you complain shows how to build a record they can use.

How CellRadar helps

CellRadar has a Network Doctor that runs step-by-step checks and gives a plain-language verdict on why the internet is slow, which helps you see whether the problem is your Wi-Fi or the line. Its speed test records download, upload, ping and jitter, and the history and reports feature exports PDF and CSV reports you can share with your provider.

Frequently asked questions

Should I restart my router before calling?

Yes. It is one of the first things support will ask, and it sometimes fixes the problem on its own.

Will my provider fix slow Wi-Fi?

Usually only if their router is faulty. Weak Wi-Fi in distant rooms is normally down to placement, walls or the need for extra coverage like a mesh system.

What if my provider says the line is fine?

Share your test results from a cable at different times, and ask for a line test and a reference number. Clear records make it easier to escalate.

Can I get money back for slow internet?

It depends on your contract and local rules. Some providers and regulators have speed guarantees, so check your terms and keep your records.