This guide will tell you how to use Killstreaks in Call Of Duty Modern Warfare 2. Go through the guide and follow the simple steps below to do so.
The first thing you will need to do is boot up your game and press the right d-pad button as it will provide you to access the multiple different kill streaks that you have unlocked. After that, release the right d-pad and then press the right thumb stick. Now you will able to use your kill streak.