Text Message Data
Basically, Apple – and other companies – store text messages so they can make sure they were sent properly, and allow you to resend them if something goes wrong. So far, so good, but the company is very quiet about how it stores these texts, and how long they are actually kept before being deleted.
Even more disturbing, there is clear evidence that Apple keeps track of when you message someone, who you messaged, and if you call someone on FaceTime. There is apparently no way to stop or block this type of tracking, except to use another messaging service (which, of course, involves its own risks). Although Apple has proven that it takes user data privacy very seriously.