Whether you've got an iPhone 16 or an earlier model, here's how to fix your unresponsive device.

Apple's iOS 18.1 Inactivity Reboot automatically reboots your iPhone if it hasn't been used or unlocked for more than three days, providing better data protection.

Instead, Apple added a new security feature in iOS 18.1 that forces iPhones to reboot after a period of inactivity. The change was first pointed out by security researcher Jiska Classen on Mastodon.

The iPhone 16 series has been suffering from a curious bug—random restarts. People using the iPhone 16, 16 Plus, 16 Pro, and 16 Pro Max have reported that their phones have been restarting on ...