Microsoft Research Labs have released an app for Windows Phone users to help them test their upload and download speeds on their cellular and wi-fi networks. In addition to these variables, one can also see more information about packet loss, max jitter and latency.

How the application works?
When you test a network connection using the App, certain characteristics of your device and the network connection will be sent to Microsoft for testing both, network quality and availability. If allowed, it may also collect information about your location at the time of the test.
Network Speed Test
  • Provides detailed information about the upload and download speeds of your internet connections.
  • Maintains a history of the internet connections you’ve tested for easy comparison.

This app is available to download free from the Windows Phone Store