you get your phase 3 invite via email. Sometimes they will call you a couple days before the scheduled day they're running phase 3 when notified candidates are not able to make it there. I interviewed two weeks ago then got the call for phase 3 a few days later for phase 3 last week then got a class date for early july. The week I interviewed, I did phase 1. I didn't have to redo phase 2. I did phase 2 last year. I've interviewed several times before, but finally got in this year. Don't give up, there's a lot of reasons people don't get hired, but persistence will pay off.