iPhone 6 Plus fail to switch on

[basheerkaku]

Today Morning my iPhone failed to give alarm, though I set the alarm to 4.30AM. Then I find that though battery is fully charged, it fails to switch on. Repeated attempts to switch on also failed. Help pls

 

[bear7962]

• Want iPhone to wake you? Tap Alarm, then tap
  
  .Set your wake-up time and other options, then give the alarm a name (like “Good morning”).