Fake unread messages
My phone shows 35 unread messages but I've opened everything, why?
My phone shows 35 unread messages but I've opened everything, why?
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)
Fake unread messages