Using the Wake/Sleep button to end calls under iOS 10

Do you all remember the Time when we all use to end the calls with the power button? Yes that time is back now now you can end the calls with the power button in the iPhone 6 6+, 6S, 6S +, 7, and 7+.
you must be wondering how? So the answer is you need to update your iOS to the latest iOS 10 then you need to go to the voice-over settings then audio turn off auto select speaker during calls that's it you are done now whenever you want to end the call you need to away your phone from your ear and then press the power button the call Will be ended
hope this helps