Is It Your WiFi or Your Internet? A Three-Minute Triage

“The internet is down” almost always means one of two very different problems — a WiFi problem inside your house, or a problem with the connection coming into it — and they have completely different fixes. This is the fastest way to tell which one you actually have.

The three-minute triage

1. Find any device that can take an Ethernet cable — a laptop is easiest, but a desktop or even a game console works. Plug it directly into the router or modem with a cable.
2. Run a speed test on that wired connection. This site’s Speed Test works the same wired as wireless — that’s the point.
3. Compare the wired result to what your plan promises, and to how the connection has been feeling wirelessly.
4. That one comparison tells you almost everything — see the next two sections for exactly what each outcome means.

Wired test versus wireless test

This single test is the whole diagnosis, because it removes WiFi from the equation entirely. A cable has no channel congestion, no wall attenuation, no signal strength to worry about — it either carries the speed your plan promises, or it doesn’t, and there’s no middle explanation involving router placement or neighbor interference. If the wired number matches your plan and looks clean — good latency, no huge loaded-latency spike — the connection coming into your house is fine, full stop, and the problem is somewhere in the wireless hop from router to device. That’s genuinely good news: it means the fix is a WiFi guide away, not a call to your ISP — the guides on router placement, channel congestion and coverage in one room all live one click from here for exactly this situation.

If the wired number is also bad — well below what your plan promises, or showing the same bufferbloat and latency problems you saw over WiFi — WiFi was never the issue. The problem lives upstream of the router: the line itself, the modem, or your ISP’s network, and no amount of router repositioning, channel picking, or mesh node buying will touch it.

What “it is fine on my phone” tells you

“It’s fine on my phone” is a genuinely useful data point, but it’s easy to misread. A phone standing right next to the router, on a strong 5 GHz connection, will often test fine even when a laptop in a back bedroom on a weak 2.4 GHz link doesn’t — that’s consistent with a WiFi coverage problem, not evidence against one. What it does not tell you, on its own, is whether the connection itself is healthy, because a phone standing next to the router is testing the best possible WiFi conditions in the house, not the internet connection in isolation. The wired test in this guide is the one that actually isolates the internet connection from WiFi entirely; a good phone result near the router is suggestive, not conclusive.

When it is the ISP and not you

A bad wired result is the clearest, least ambiguous evidence there is that the problem is upstream: no cable, no router setting, no device on your end can explain a connection that’s slow or broken with WiFi completely removed from the picture. At that point the useful next steps are on your ISP’s side: check the modem’s own status lights against its manual (a blinking or red light where there should be solid green is often diagnostic on its own), power-cycle the modem and router in that order, and if the problem persists, it’s a call to your ISP, not another hour spent on router settings that were never the cause.

What to do when it is an outage

Sometimes the honest answer isn’t a setting on either end — it’s that your ISP, or a specific site or service, is having a real outage, and no amount of troubleshooting on your side will fix someone else’s problem. This is a genuinely common situation, and it’s worth recognizing quickly rather than spending an hour resetting equipment that was never broken: if your wired test looks bad and a quick check of Downdetector shows a spike of reports for your ISP (or for the one specific site or app that’s misbehaving while everything else works fine), that’s your answer. This site doesn’t track outages itself — Downdetector’s crowd-sourced reports are simply the better source for that specific question, and pointing you there instead of pretending to have that data ourselves is the honest answer, not a shortcoming.

Why this triage works even when you’re not sure what “bad” looks like

You don’t need to know the exact numbers your plan promises to make this triage useful — you just need the wired and wireless results to disagree or agree. If the wired test and the wireless test both look roughly the same (both fine, or both struggling in the same way), WiFi almost certainly isn’t the differentiator, because you’ve held it constant by removing it from one side of the comparison. If they disagree — wired clean, wireless struggling — WiFi is very likely the answer regardless of what the absolute numbers are, because the one variable that changed between the two tests is the one thing responsible for the difference. This is why the three-minute triage works as a first step even before you’ve read any of the more detailed guides on this site: it doesn’t require interpreting six different metrics, just comparing two results against each other.

A second data point: restart the right thing, in the right order

If the wired test comes back bad, one troubleshooting step is worth doing before calling anyone: power off the modem, wait about 30 seconds, power off the router, then power the modem back on first and let it fully reconnect (its status lights settling into their normal pattern) before powering the router back on. Doing it in that order matters — a router that comes up before its modem has a live connection can get stuck in a bad state and need a second restart to recover, which is a common source of “I already tried restarting it and it didn’t help” reports that a correctly-ordered restart would have actually fixed. This single step resolves a real fraction of “the internet is down” situations that have nothing to do with an actual outage or a WiFi problem — it’s worth doing once, in the right order, before concluding anything else.