I use Google Voice as a home phone service. I have connected an ObiHai device to my main phone box so calls to my GV number can be picked up anywhere in the house a landline is connected. Is there a way for me to use my GV number on a no contract cellphone plan that I use when I am not in the house? Is there a device or a way for me to use my GV number in my house (as currently described) and with a cell phone?