Google voice for windows mobile- iDialer

so first download the program HERE and configure the settings HERE
follow the on-screen instructions and download a cab for the settings
use the cab on your device and it should work (provided that you've already installed the iDialer)

So I, like many others out there, have Sprint. And I also have the pick 3 numbers on my account. And now I finally got my Google Voice Number. What does this have to do with anything? Let me explain. With a “pick X amount of numbers that you have unlimited calling to” and Google Voice, you have all the ingredients for free incoming and outgoing calls without using a single minute.
The guide below will show you how.

1) First thing to do is register with Google voice. Get a phone number with whatever number you want to give out. This will be your “new cell phone” number. When you register with GV, you will be asked to add a phone to your account. Add you cell phone and finish setting it all up on their website. (You probably want to import all your contacts into GV so callers don’t need to announce their names).

2) Now call up sprint and give them you GV number and tell them that you want that as one of your free numbers.

NOW ALL YOUR INCOMING CALLS ARE FREE! (Provided that your callers call your GV number – not your real cell number

How does this work you ask? Well, the caller calls your GV number and Google calls your cell. It shows up on your cell bill as your GV number calling. And that number is free to call you!

Now for the outgoing…

PLEASE NOTE THE PERSON YOU CALL WILL SEE YOUR GV NUMBER – NOT YOUR REAL CELL NUMBER