Apple, T-Mobile Face iPhone Data Security Class Action

Apple Inc. failed to alert consumers to a significant security flaw in the iPhone operating system that gave third parties unauthorized access to users’ iMessage correspondence and FaceTime calls, according to a new class action complaint filed in federal court. The suit also alleges that T-Mobile USA Inc.'s practice of recycling phone numbers linked to SIM cards exacerbated this problem.

Apple represented to consumers that the iPhone’s iMessage and Facetime features were highly secure methods of communication, according to plaintiffs Tigran Ohanian and Regge Lopez. But a flaw in Apple’s iOS software, known only to the company, jeopardized these communications,...