Separate internet speed and Wi-Fi coverage
Run comparable tests near the router and at the problem location. Where practical, add a wired test with suitable equipment. A room-specific drop and a poor result everywhere suggest different next checks.
Record more than download speed
Note upload, latency, test server, device, time and other activity on the connection. Repeated results under similar conditions are more useful than one peak reading. Different test services can produce different measurements.
Compare against your actual task
A video call, cloud upload and web page load stress different parts of a connection. A fast download result does not prove all three work well. Observe the task alongside measurements.
Bring useful evidence to support
Record dates and errors and check the provider's current contract terms. Device limits and network activity can affect results. Avoid treating an advertised maximum as a guaranteed measurement at every time or location.
Questions about this guide
Why should I repeat a speed test at different locations?
Comparing a wired or near-router result with the problem room helps separate the internet connection from WiFi coverage. Use similar conditions and note other active downloads.
Does the download number explain a poor video call?
It is only part of the picture. Note upload performance, delays, interruptions and whether other devices have the same problem before deciding what needs changing.