You're probably already familiar with the SIM card, a tiny chip in your phone that connects it to your cell phone carrier of ...

Once you exit the Settings application, you can try out the newly enabled Back Tap feature by tapping the back of your iPhone -- in my case, to turn on the flashlight. To turn off the flashlight, you ...

But for parents who have already invested in smartphones for their kids, yet want to rein their usage in a little bit, there ...

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