(adsbygoogle = window.adsbygoogle || []).push({}); does anyone know how to do the 10th prestiege glitch in nazi zombies?

I was told

1.Play a FFA game.

2.Play zombies make sure ur host.

3.get alot of kills

4.Go into barracks and click on prestiege and ur instantly 10th

but that didnt work for me plz help?