that thing is supposed to let you use your mobile data on a pc using some shady hacky bullcrap workaround but its so sketchy they arent even using ssl on their website and their driver doesnt support anything new lol
T-Mobile One's unlimited data plan isn't quite as unlimited as advertised—especially when it comes to tethering. We'll show you three ways to get what you paid for while using mobile data on your PC.
Method 1 – Dun = 0 [Android Only] Requirements: Windows PC, USB cable
Download the ADB and Fastboot installer from XDA-developers. Select Yes when prompted by installation options (install ADB and fastboot, install system-wide, and install drivers). Enable USB Debugging on your phone/tablet. Connect your phone to your computer via USB cable. Open up the command prompt. Click Start, in the search Type in cmd. Next, Click on the program cmd (or Command Prompt). Type “adb shell” and press enter. Don’t type the quotation marks “”, just the text inside them! Type “settings put global tether_dun_required 0” and press enter.