FAST FIVE: What Your IPhone May Be Telling Mysterious Companies About You… Without Your Permission

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That's according to an article in the Washington Post.

The Post tracked how dozens of marketing companies may be using your personal information that it gets from apps to send out to other companies.

At 11:43 p.m., a company called Amplitude learned my phone number, email and exact location.

At 3:58 a.m., another called Appboy got a digital fingerprint of my phone.

Do you know who your iPhone is talking to?” by Geoffrey A.

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