The program mainly to test my local HSDPA speed without the need to connect it as a modem to PC. It seems to show real download speeds e.g. my home broadband has 1 Mbit/s of downrate, and PST shows data rate at about 1010 kbit/s so quite close to 1024.
PST downloads a 1 MB file in order to test your connection speed so be aware of costs, you'd better test your connection with an unlimited data plan or packet of relatively cheap data transmission (like in my case). But it's all your thing, do as you like.

The system requirements are:
- A Pocket PC Phone or classic one (e.g. if you want to test hotspots) based on Windows Mobile 2003 SE or newer; a WM5+ Smartphone should work as well but was not tested.
- .NET Compact Framework 2.0 installed on device (on WM6 devices preinstalled by default).
- Any Internet connection on device (if no WiFi or Cable, a packet data connection is activated automatically).

Transfer it anywhere to your device and here you go.