Just need a little clarification

[Elle]

Hi,
I am interested in your wifi phone and would appreciate it if you
could explain to me a missing piece.

I understand how google voice works with gizmo. and, that google
provides you with a phone number, and gizmo provides you with an sip
number.

when i receive the wifi phone, there will be no number associated with
it. do i need to purchase a phone number, or can i program my gizmo
sip number into the wifi phone.

thanks.

ellie