Apple's next legal battle is not over patents, but missing text messages instead. The tech titan must answer to a federal lawsuit filed in May that alleged the company didn't notify consumers about potential headaches when ditching their iPhones, US District Judge Lucy Koh of San Jose, Calif., said Tuesday. The company's iMessage service, which allows users to send missives to one another through Apple's encrypted communication network, doesn't work on phones powered by Google's Android, Microsoft's Windows Phone or any other non-Apple operating system. Yet, when some consumers switched away from iPhones, their iMessages were not rerouted to their new phones. Worse, affected users usually think their message are delivered even though they never are while never being informed of friends' messages that are sent but never received.

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