DownSights writes “Call of Duty: Warzone was suffering from a pretty severe hacker problem until recently when Activision and Infinity Ward implemented stricter anti-cheat measures, including the need for phone number verification on new accounts.
This new security measure did succeed in cutting down cheater numbers significantly, but now sightings and reports of cheaters are on the rise again, and it’s possible the community has figured out why.”
Source: N4G PC Hackers Circumventing Phone Verification To Cheat In Call Of Duty: Warzone