When your gadget becomes
frozen, unresponsive, or locked on a white or black screen, the first advised cure is to force restart it. This causes all apps and system processes to close and
reset your device
without impacting any vital data stored on the device's internal memory. If you haven't done so previously, you should give it a shot. Here's how to do it:
Simply press and hold the Power and Volume Down buttons simultaneously for 10 to 20 seconds to forcibly restart your iPhone 7 Plus, then release both buttons when the Apple logo displays.
Wait until your gadget has completed a power cycle before