U need a lobby for that, so, u must to ask about a lobbyman who is able to do it for u, yeah for sure u must pay...
Or find a friend who have a jailbreak to do it for you for free.
The following user thanked ThibLeg for this useful post:
I mod Call of Duty Black Ops 2 10 Paypal or 10 PSN or = Any stats Unlock all, Custom class names and Any prestige.My antiban wont let you get banned or reset also the stats will stick, proof will be shown before anything. Message me if your interested