Many people are using iPhone models earlier than the iPhone 7, and Tam may find their Home buttons sometimes unresponsive. If this happens to you, you can take the following measures to recalibrate it.

Calibrate iPhone Home Button-UFASK
  1. Open any app (the example above uses the Clock app)
  2. Press and hold the Sleep/Wake button until the "slide to power off" screen appears
  3. Press and hold the Home button until the power off screen disappears. This takes approximately 5-10 seconds.