What does "After porting your number to Google Voice your mobile service plan will be cancelled.." mean? I am on AT&T; does this mean I am no more a part of AT&T?
It works like this:
1) You port your number to GV. That has the effect of cancelling your carrier plan - you're no longer their customer. (Same as if you ported from Carrier A to Carrier B.) You may have to pay early termination fees.
2) You then start over with your carrier (or a new one) - say "please give me service with a brand new number. Oh look, I already have a phone."
3) Once your cell phone has a number, you put that into GV as a forwarding number.
Now the number that everyone already knows is your GV number, and you can keep your mobile number a secret if you like.
You will be assigned a new number from AT&T. You will then point your ported (existing) number from Google Voice to the new number AT&T assigns you. Note, if you're currently in contract, you are subject to early termination fees. This is not any different than porting from AT&T to another carrier such as VZW in as far as they are concerned - even if you are simply getting a new number from the same carrier.
