Call of Duty: Warzone Mobile is currently still in development and being optimized to run on a variety of devices. To be able to play during Limited Release, your Android or iOS mobile device will need to meet the following requirements: Apple: iPhone 8+ or better. Android: Adreno 618 or better.
Call of Duty 4: Modern Warfare Mobile is a spin-off game of the Call of Duty series and is a prequel to the main game.
