please read:
For all of you people trying to get in the 10th and XP lobbies be careful Treyarch released a hack and this is what they said with their code of conduct.
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A source familiar with the situation informs us that the glitch is real and Treyarch seem none the wiser, yet!Surely by the end of the day, there will be hundreds of players that will have taken advantage of the glitch while it works. But The Tech Game is here to warn you that Treyarch will catch and punish anybody caught abusing the glitch. If you don't believe us, then here is a copy of Treyarch's Code of Conduct: Modding/Hacking
Any user who runs a modified version of game code or uses a modified game profile is subject to penalty.

First offense: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Console users in possession of illegally acquired content will also be reported to console manufacturers. PC users on Steam will be reported to the Steam enforcement team.
Unsupported Peripheral Devices & Applications
Any user who utilizes an unsupported external hardware device or application to interact with the game is subject to penalty. Unsupported peripheral devices and applications include but are not limited to modded controllers, IP flooders and lag switches

Minor offense: User will be temporarily banned from playing the game online, will have their stats & emblems reset and will have their leaderboard entries deleted.
Extreme or repeat offenses: User will be permanently banned from playing the game online, will have their stats & emblems reset, and will be blocked permanently from appearing in leaderboards.
Boosting
Any user who colludes with another user to exploit the game for the purpose of gaining XP, prestige, game score, weapon level, or in-game unlock is subject to penalty.

This glitch will probably qualify as a minor offence, but for those that have repeated it multiple times to reach prestige level 10, expect to be banned!
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do it at your own risk, Ihink about it why waste all that time to play a game then cheat your way to the end? then when you have everything the game is no longer fun! if you want to talk to me or argue send me a private chat to... DJ Terrorize have a good day:)