Your phone has a special magic inside called a rotation sensor. It’s like the phone can feel gravity and knows which way is up. When you tilt your phone, it checks where gravity is pulling, that tells it to turn your screen so it matches what you're looking at. It's why your phone rotates when you go from texting to watching videos.
Examples
- Tilt your phone while playing a game, the screen moves with it.
- When your phone changes from portrait to landscape mode, that's the sensor working.
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See also
- How Do Smartphones Know When You're Taking a Photo?
- How Do Smartphones Know When You're Tired?
- How Does Your Phone Know You're There?
- Why Do Smartphones Know When You're Walking or Driving?
- Why Do Phones Automatically Rotate When You Turn Them?