![]() If you're using one of our mobile apps, this process all happens in the background before you press Begin Test. (For more information, you can read our article on the full testing methodology used on .) We can then begin the full test process: measuring your ping, download speed, and upload speed. This is the server that's "closest" on the network, and usually provides the most accurate results. We then ping those nearby servers, and choose the server with the lowest result, meaning it took the shortest time for a response. ![]() Once you press Begin Test, we take your location and determine up to five nearby servers (using spherical geometry). After loading the list of 1000+ servers and the appropriate map tiles, we can display the map of hosts on the front page. This tells us where to center the map-but more importantly, it also tells us which servers are nearby. If the video test finds that the video streaming quality meets or exceeds the resolution supported by your device and you are still unable to stream your video, you will have the option to continue on to Ookla’s Downdetector® to see what online services are currently experiencing any issues.The first step begins before you even press the button: we look up your IP address in a GeoIP database to determine your approximate location. Try video testing on Speedtest for iOS today by opening the Speedtest app on your phone (or downloading it from the Apple App Store if you don’t already have it).
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