Why Do Smartphones Know When to Switch Between Wi-Fi and Mobile Data?

Smartphones are like cars that know when to switch from a highway to the city. When you're on Wi-Fi, it's like driving on the highway, fast and smooth. But if the Wi-Fi slows down or disappears, your phone switches to mobile data, like switching to city roads. It checks both options in the background all the time so it can choose the fastest one without you noticing.

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Examples

  1. Your phone switches from your home Wi-Fi to mobile data when you walk out of the house.
  2. If your Wi-Fi connection gets slow while watching a video, your phone automatically moves to mobile data.
  3. Your phone uses mobile data instead of Wi-Fi at school because it detects that Wi-Fi is less strong.

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