If we had tested the same connection using a laptop’s Wi-Fi connection and then plugged the laptop into the router via Ethernet to test again, you could expect to see the same results despite the test being conducted on the same device. What does this look like under real-world conditions? Let’s jump right into an example that will likely feel familiar to tons of folks who have run speed tests using their smartphones and unknowingly run into the bottleneck problem. A new Wi-Fi router paired with a new smartphone has more than enough bandwidth capacity to outpace a 25 Mpbs DSL connection. The exception to this rule, of course, is if you’re rocking really nice hardware connected to a slow broadband connection. If your overall broadband speed is higher than what the Wi-Fi gear in your house can handle, you’ll always get inaccurate results running a speed test using a Wi-Fi device. This includes not only smartphones but everything else on the network using Wi-Fi including tablets, laptops, game consoles, streaming devices, and smart TVs. Why? Because, except for folks with slower connections, the overall speed of the internet connection (as measured directly at the modem) is faster than what a single connection between the Wi-Fi hardware and any Wi-Fi device can handle.

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