You do have to set the GV acct to show your GV number, or else you get charged for regular minutes used. The bad part is you won't get caller ID (all calls show up as Google Voice from my phonebook), the good news is you don't use up minutes since it's a myFaves. Last month I used 0 regular minutes, even though I used about 400 myFaves. According to what I just read myFaves is going away with Project Dark, but users will be grandfathered in. If you want it, make up your mind in the next few days. No minutes used, free SMS via my GV app, what's not to love?