I have a question about the rewards (emblems) when the final game comes out. I played the alpha and the beta in my sister's ps4 cause i don't have a ps4, i pre-order the white ps4 with the game on september, but do i need to play the game on my sister's ps4 first so i can get the reward because of the save data there or i can play with my account in my new ps4 and i will get the emblems right away?
The Alpha has nothing to do with Beta rewards, so it doesn't matter if you played that. The rewards are an emblem for playing in the Beta, and a second emblem for being part of the stress test on July 26th 2-6 PM PDT. Those are tied to your account, not a specific console.