The CallPhantom apps achieved 7.3 million installations on the Google Play Store but provided users with randomly generated data instead of legitimate information. ESET, part of the App Defense Alliance, discovered the deceptive nature of these apps and reported them to Google, leading to their removal. Some of the 28 identified apps had bypassed the official billing system, complicating refund processes. The investigation began with an app called Call History of Any Number, which falsely claimed to provide call histories for any number, despite being associated with a misleading developer name, Indian gov.in. The apps produced fabricated call histories by generating random phone numbers paired with fixed names and call details. They primarily targeted Android users in India and utilized the widely used UPI payment system. User comments in the Play Store warned others about the fraudulent nature of the service. The apps also employed tactics to lure users into paying for non-existent data, including fake email notifications prompting users to subscribe.