Prior to this change, new accounts in Modern Warfare could access Warzone without a SMS security check. In August 2022, we updated the SMS policy for new players of Call of Duty: Modern Warfare (2019), requiring a text-enabled mobile phone number to play the game. This helps our security team to maintain account and game security in order to provide a safe, fair, and fun gaming experience for all our players. SMS verification is critical to our anti-cheat enforcement efforts, tackling illicit account creation at its source. A mobile phone number must be linked to your Steam Account to play Modern Warfare II on that platform. The SMS policy for Modern Warfare II and Warzone 2.0 on is the same as the requirement for Call of Duty: Warzone on PC, which was implemented in May 2020. Existing Call of Duty®: Warzone™ players that have previously verified their account will not be required to provide any additional information to access Modern Warfare II and Warzone™ 2.0. A text-enabled mobile phone number is required to play Call of Duty: Modern Warfare II on PC.
