How do I resolve 'This accessory may not be supported' error and restart iPhone?
Stuck in "This accessory may not be supported." Can't restart.
[Re-Titled by Moderator]
Question marked as
Try a forced restart.
• Press and quickly release the volume up button
• Press and quickly release the volume down button
• Press and hold the side button.
• When the Apple logo appears, release the button.
Force restart iPhone - Apple Support (IN)