First of all credits to UnknownModder for making these saves so you don't have to get in a lobby to do the unlimited prestige token glitch.
Secondly, these saves are for WORLD AT WAR so if you don't have World at War as well as MW3 stop reading now.
Lastly, there are 2 links. One to take you to Prestige 1 the second to derank you.
So to get multiple tokens go prestige up, derank, prestige up, derank etc.
But if you're above No prestige use the derank one first. Okay now onto the tutorial;
1)First of all, download the saves at the bottom of the tutorial, keep them somewhere like your desktop for easy access
2)Replace the ID's in horizon/modio etc. with your ID's.
3)Overwrite your save on W@W with the modded one which takes your rank up which now has your ID's.
4)Start up World at War resume game and follow onscreen instructions.
5)go into zombies on xbox live and see if your rank has gone up, if it has go into an online match(not of zombies) and get a kill.
6)Wait up to an hour (most of the time less) then check if you have more prestige tokens on MW3
7)If you want more tokens,repeat steps 3-6 with the derank save wait some more and you some more then do it again steps 3-6 again with the prestige up save.
This worked for me as of 3 days ago, this CAN get you banned, do not complain to me if it does.
Good Luck and Enjoy your tokens