Smartphones have sensors that help them know when to wake you up. Think of it like a clock inside your phone, it knows the time, and if you set an alarm or your phone gets a message, it wakes you up. Just like a friend who taps you on the shoulder in the morning.
Examples
- Your phone wakes you up because it sees the time and knows it's your alarm.
- A message arrives at 3 AM, so your phone turns on to show you who is texting you.
- Your phone feels movement, like when you roll over, and decides it's not yet time to wake up.
Ask a question
See also
- How Do Smartphones Know When to Vibrate?
- Why Do Smartphones Automatically Brighten or Dim?
- Why Do Phones Know When to Vibrate?
- How Do Smartphones Know You're Taking a Photo?
- How Do Smartphones Know You're at the Airport?