Apple on Mondayunveiled iOS 16for the iPhone. The update which is expected to be available this fall includes improvements to the iPhone's lock screen with revamped notifications and widgets, improvements to iMessage conversations, and changes to the Mail app. 

When the free update arrives - likely in September based on Apple's previous release schedule - there will be a handful of iPhone models that currently run iOS 15 that will be left behind. 

According to a list of compatible devices posted on Apple's iOS 16 preview website, the following iPhones are compatible with iOS 16: 

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• iPhone 13
• iPhone 13 mini
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 12
• iPhone 12 mini
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone X
• iPhone 8
• iPhone 8 Plus
• iPhone SE (2nd generation or later)

Last year's list looks nearly identical starting with the iPhone 8 or newer. But not included on this year's list is all iPhone 6 and iPhone 7 models, along with the original iPhone SE. All three models will be stuck on iOS 15 (and subsequent security updates) once iOS 16 is released.

Also: The simple but very hidden trick to more iOS and iPadOS update control

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