While Apple did a fantastic job building a very reliable operating system, the firmware can crash at any time, causing the phone to freeze and become unresponsive with a blank screen. Apple developers anticipated this, which is why you may utilize a very easy way to try to restore the phone back to life in a minute or two–forced reboot.

• After pressing and holding the Volume Down key, press and hold the Power key.
• For 5 to 10 seconds, hold them together.
• If there's enough battery, the phone should reset and return you back to the home screen 95% of the time.
• Try putting the charger into a power source and connecting the cord to your phone's charging port once the device is already activated and ready to use. If the iPhone replies and charges, the issue is resolved; otherwise, proceed with the troubleshooting