
Just because your iPhone can run the latest version of Apple's iOS software doesn't mean every feature included in that update will work on your phone. Sometimes, select features have hardware requirements that older devices simply can't meet.
And that's true of iOS 18, which Apple just previewed at WWDC 2024. When it arrives later this year, iOS 18 will run on iPhones dating back to 2019, including the iPhone XR, iPhone XS and iPhone XS Max. But a handful of iOS 18 features aren't going to work on older handsets, and it's good to know which ones you're potentially missing out on.