Accessory not supported message on iPhone.
The message accessory not supported has my phone locked and I’m unable to respond or power off. How do I fix this?
iPhone 15 Pro Max, iOS 17
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)