Must have 2 controllers .
1. Start up using your prestige master account , then click (X) till you are in public game .
2. Press (O) till you are on the MAIN SCREEN , then sign into your second controller
3. SPAM X as fast as you can , should take you to local .
4. CLICK ON MULTIPLAYER
5. Stay for EXACTLY 10 Seconds
6. Press (O) TWICE then go to public match
7. Change your TITLE.
8. You should be master prestige , congrats !
There is a few added parts I found to be more useful then doing the other methods over and over AGAIN LOL.