Use Google Voice Directly with Your Current Mobile Phone Number?

I love my Google Voice service and my Google number. It is what I give out to many people now. If I decide to switch between carriers everyday (I have multiple carriers to test phones), I can just change which one it forwards to my current primary phone with worrying about number portability. I also have that number set to forward and ring both my desk phone and cell phone during the working hours during the work week.