India, Oct. 21 -- Call of Duty: Mobile's Anniversary update is already hereand looks like players have alotto uncover and find. One of the hidden rewards for players is a brand-new rare skin for the M4 assault rifle. Called the Anniversary Skin, the reward is only available to players to punch in a promotional code for the game.

How to get the rear M4 assault rifle skin for free in Call of Duty: Mobile

The first thing you will need to do is copy your UID. This can be found in your profile page, under the second tab. The code is quite long and thankfully, there is a handy little 'copy' button right next to it.

Next, head over to and put in your UID in the respective field. In the 'Redeem Code' section. Put ...