Care package glitch #1- This glitch helps with speedy things, like knifing around the map instead of shooting. This is the simple glitch and only requires 3-4 kills with care package on(or sentry gun or E. airdrop). Just obtain the care package, hold it in your hand, and your speed will dramatically increase. This helps with perk challenges, like commando, lightwieght, marathon, and the close range kill perks(scrambler, ninja).
Care package glitch #2- This is one of the best glitches in the game, and infinity ward has not discovered it or has not gotten rid of it...yet. The glitch lets you throw a care package, sentry gun, or emergency airdrop and reuse it(but no exp points are awarded on usage). To do the glitch, all you have to do is find a ledge where you can mantle(press A to climb) and have a care package at hand(press right on the d-pad). While climbing, press right on the d-pad quickly so above the compass, equipment, ammo, etc. it should say the gun you have and then once you press right on the d-pad the second time, it should change to the care package again. To know if you did it right without actually using the package, the care package should come to your hand very fast. Recap- have a care package in your hand, climb a mantable surface, press right on the d-pad twice fast, and if you switch out the care package to your gun and then quickly again to the care package, it should bring it out faster than usual, and then you use it. If done correctly, you will throw it and get no exp. points, but a successful and usable care package. This glitch is widely known and helps get killstreak challenges unlocked. The best thing that can come from a care package is EMP, because nuke wouldn't be very fair if it came from a care package. If anyone has gotten a nuke from a care package, which I doubt, I would like to see a youtube vid about it. Back to the subject. The infinint care package glitch can only be used once you have used your killstreak reward( If you earned an airstrike, for example, you can not use the care package glitch again until you call in the airstrike). If you care package a resupply, you cannot use the care package again until you die. So if you get resupply, get killed, and go back to the spot and glitch again. Make sure you are in a good spot and find different spots often, because the heli that appeares on the UAV that drops your care package reveales where you are glitching, and the enemies will also know that you are glitching if they see a helicopter without their leader saying "enemy care package incoming". If they don't say that and you see an airdrop copter, then the enemy knows your glitching. Have fun and try not to get anything dropped on you or stolen by an enemy. I know it was long, but I hope you read and I hope I helped.