Apple introduced a new security feature in iOS 18, Activation Lock for iPhone parts, which might prevent some thefts in the future.

Launch Settings on your iPhone and select General followed by Software Update. The Software Update page will show the latest available version of the iOS you're running. (Or, if you're up to date, it will show that you're up to date.) Below that, tap the link for the iOS 18 update.

Even if you don’t buy an iPhone 16, you can install iOS 18, which is out today, and start customizing your home screen in new ways, text high-res videos to your Android friends, and store your passwords in Apple’s slick new password manager. But as for all those AI features you may have heard so much about, those aren’t ready—at least, not yet.