How to test your WiFi / LTE / 3G Mobile Network speed on Windows Phone
When you want to check your internet speed Speedtest.net is by far the best option you have and now they have an official app on Windows Phone that lets you do exactly that. SpeedTest.net Windows Phone App is great for benchmarking the speed of your mobile network or WiFi to find the average download and upload speed. The app has some coll features like history of previous tests ability to test you upload , download and ping speeds, ability to share your result on social networks and more.
SpeedTest.net is a FREE app for Windows Phone, there is an option to upgrade the app to remove the ads ( the version I used was the free version but had no ads )
SpeedTest.net XAP Download