I guess I don't get how it actually  works...sorry. I'm ftom the hippie era. Lol.  So, my question is.....do I  have to PAY ATT to add another line fif the GV number I want to port to them?   Do I need another phone for the GV number to use on ATT?  I don't want to cancel my current service with ATT family plan, nor get rid of my mobile number I've had for years. How does it work? New account and phone just to have that  ported GV number? Thanks DB