The Apple iPhone 17 event just concluded, and Apple largely delivered on all of the rumors ahead of the show. The company announced the iPhone 17 lineup, the iPhone Air and several other devices. (Check out Engadget's real-time Apple event liveblog for full details.) In addition to finally seeing the new hardware, Apple confirmed after the event that we'll be able to download the final versions of iOS 26 and iPadOS 26 on Monday, September 15. (That's when all of Apple's other operating system updates hit, too.)Coming with those OS updates are substantial changes to your iPhone and iPad's software. You may have already heard about "Liquid Glass," which (intentional or not) is sort of like Apple's take on the old Windows Vista design language. That's the most notable change, but we spent two weeks test-driving many of the other features included in the update - you can check out our hands-on iOS 26 preview for more impressions.Not sure if you want to upgrade your smartphone or tablet? No worries, we'll help you find out if your devices will be able to run iOS 26.While Apple didn't nix any iPhones from its eligibility list last year, that's not the case for 2025, as a few models are getting the axe this time around. All iPhone 8 models and the iPhone X were the last to receive the boot in 2023, and this year iPhones released in 2018 will be left behind. If your device is ineligible, you won't be able to download iOS 26 when it becomes available next week.You can find a full list of iPhones and iPads that will support iOS 26 and iPadOS 26 below. To see everything that's coming with the latest OS updates, you can check out our big rundown of what to expect from iOS 26. Additionally, here's everything Apple revealed at the iPhone 17 launch event.These three iOS 18 iPhones won't be compatible with iOS 26Unlike last year, a trio of iPhones won't be eligible to download the newest iOS when it makes its debut. These three models that were first released in 2018 won't be coming to the iOS 26 party: