First:
You must be Level 80. Go to CoD Elite and Sign in.
Second:
Go to your classes and change something, i.e a camo or just a gun (Dont do any of that inspect element stuff).
Third:
It should tell you to send changes to the game but do NOT click it yet. Now in MW3 prestige yourself.
Fourth:
Now, play Multiplayer until you reach Level 4.
Fifth:
Now that you are in Level 4, in CoD Elite click on send changes to game.
Sixth:
In MW3 accept the changes of CoD Elite and BOOM your classes are back!!
Hope you guys like it
The following 71 users say thank you to DiJiTaLNiCk for this useful post:
Everybody who has done this...Enjoy a nice ban and derank. Any glitches involving Elite will get you banned, period!
Naw you most likely won't get banned for something like this.
Things like boosting are much more obvious (due partially to your direct interaction with leaderboards and things like that) but something like this is unnoticeable for the most part.
The following user thanked Mortox for this useful post: