What’s the best way to figure out whether it’s the WiFi or the ISP causing the problem?

I’m trying to figure out why my home internet is slow, but I can’t find the weak point.

The symptoms are strange: everything freezes in some rooms, the video connection is choppy, and pages are “thinking.” Meanwhile, speed tests show acceptable results—not ideal, but not a disaster either.

So, it’s unclear:

1. Is the ISP acting up?

2. Is the Wi-Fi not connecting?

3. Or am I just measuring incorrectly?

How can I definitively determine the culprit—the internet at the entrance or a poor signal in the house?

First off, stop taking speed tests at their word. A typical speed test only shows how fast data travels from your device to a random server somewhere on the network. But it doesn’t tell you anything about the health of your home Wi-Fi.

Yeah, the easiest first check is: test wired vs wireless. If you plug a laptop directly into the router and things are solid, but WiFi still sucks in certain rooms, that points pretty hard at the wireless side. If both are bad, then I’d start looking harder at the ISP or modem/router side.

@Present-Implement42 Okay, that part makes sense. So if wired looks fine, that doesn’t automatically fix anything, but it at least tells me I should stop yelling at the ISP and start looking at the WiFi in the house?

Exactly. If you want to dig deeper than a simple “wired vs. Wi-Fi” comparison, test the local network itself, not the internet. You can use the NetSpot app, which integrates with iPerf. This allows you to test the connection quality between your devices in your home, without depending on external factors or servers somewhere in the middle of nowhere. This way, you’ll see how the “environment” is behaving. And you can also perform an active scan and get Wi-Fi speed heatmaps. These immediately show where the signal is “fading”.

@Ok-Image6120 Listen, that’s spot on. So, the scheme is this: if I run a test within my network and the numbers still drop in the same rooms, then the ISP has nothing to do with it and the Wi-Fi is to blame?

Exactly. That’s the whole point.