I can confirm it works an absolute treat! (just did it on my k850)
It took me a while to work it out so here's the run down:
- Download software
- Open software
- Hit settings and fill in your user and password
- Select phone from drop down lick and press unlock.
- Turn your phone off, remove the battery and put it back in (DON'T TURN IT BACK ON)
- connect the USB cable whilst you hold 2 and 5 on the keypad
- if it comes up with software installer, navigate to the drivers dirctory that comes with the software download. it will then install generic USB drivers.
- Let it run. when complete it will say successful with a green tick and you can disconnect.
You phone is now unlocked

Rep for you shane!