How to fix iPhone 6s plus that won’t load iOS (won’t boot up issue)

• For at least 3 seconds, press and hold the Power button.
  • While holding the Power button, press and hold the Volume Down button on the left side of the iPhone. Hold down the Power and Volume Down buttons for ten seconds. Repeat steps 5 and 6 if the Apple logo shows at this point.

now I phone 6s will load ios