You are yanking power away from the OS without allowing it to shutdown normally. It is a last resort measure. Just holding the top power button
 
 until asked to power off
 
 is the preferred way to remove power. You can also use those to buttons to take a screenshot of your screen, this is saved as a photo on you phone.
 
 HARD RESETS
 
 : If your iPhone happens to malfunction or glitch, a hard reset will most likely fix it. Any time this oddity happens, just press down on your Power button and the Home button at the same time for a few seconds. The Apple logo will reappear and your iPhone will reboot. After that you should be good to go.
 Press and hold the Volume Down and Power buttons simultaneously until the device turns on. You can use Volume Down to
 
 highlight Recovery Mode
 
 and the Power button to select it. Depending on your model, you may then have to enter your password and choose a language to enter recovery mode.
 Use the Home button to unlock your device or make purchases using Touch ID. Press the Home button once to go to the Home screen. Press the Home button twice to bring up the App Switcher. On iPhone X and later, press and hold the side button and one of the volume buttons
 
 to restart your iPhone
 
 .
 The iPhone or
 
 iPad will power down and turn off completely
 
 . This is quite simple, and the Settings menu approach to initiating a system shut down is a bit like the  Apple menu shut sown approach on a Mac, or the Start menu power down method available on a Windows PC.
 Press the “Power” and the “Volume Up” buttons, together,
 
 until you see the start-up logo on the screen
 
 . 4. Once you can see the logo, release the buttons and allow the device to enter the “System Recovery Mode”.
 
 Reboot
 
 your phone
Rebooting would help if the reason why the power button is not responding is because of any software or application glitch. When you reboot the device, it would help restart all the apps. For Android phones, rebooting can be done by pressing the home key plus volume key and power key simultaneously.
 You’ll need a physical Home button.
 
 Hold down the Home button (the one on the front of the iPhone or iPad)
 
 and the power button at the same time. Keep both buttons held until the Apple logo appears. Let go of the buttons and wait while your device completes its start sequence.
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 Normally, pressing the Home and Sleep/Wake buttons on an iOS device
 
 results in a capture of the present screen as a photo
 
 . That photo is then stored in the Camera Roll album of the Photos app. Perhaps you didn’t press the buttons simultaneously and ended up turning off your iPhone.
 Wake your phone by pressing the Sleep/Wake button or by pressing the Home button. It is a
 
 simple action that will wake your phone and allow you to unlock your phone to make calls or perform other actions
 
 . Putting your phone to sleep is an action that you will do frequently.
- Step 1: Open up Settings.
- Step 2: Select Advanced Features.
- Step 3: Hit Device Assistance App, followed by Device Assistant App.
- Step 4: Choose your new Device Assistance App—Google Assistant, Internet or S Voice.
 Are you asking if you can use the home button to “ACCEPT” a call? If that is the case, the home button is not designed for that, and cannot be programmed for that either.
 
 If the phone is locked, you swipe to answer, if the phone is unlocked, you will get an answer button
 
 .
 How do you do a hard shutdown on an iPad?
 
 Press and hold either the volume up or volume down button and the top button until the power off slider appears. Drag the slider, then
 
 wait 30 seconds
 
 for your device to turn off. If your device is frozen or unresponsive, force restart your device.
 
 