Apple regularly releases new iOS versions with exciting features, but not every iPhone supports every iOS version. This guide helps you quickly check whether your iPhone model is compatible with the iOS version you want to install. We track compatibility data for the latest iPhone models including iPhone 12, 13, 14, and 15 series with iOS 17 and upcoming releases. Each compatibility check includes details about which features work, known limitations, and important notes for your specific device combination.
You can check iOS compatibility by looking at our compatibility database above. Generally, Apple supports iPhones for about 5-6 years of iOS updates. For example, iPhone XS and later support iOS 17, while iPhone X and earlier are limited to iOS 16 or earlier.
Modern iOS versions are optimized for older devices, but you may notice slightly reduced performance on older models. Apple has improved this significantly since iOS 12. We recommend checking our compatibility notes for your specific iPhone model to see user-reported performance feedback.
Apple only allows downgrading to iOS versions they are currently signing, which is typically limited to the most recent previous version for a short window after a new release. Once Apple stops signing a version, you cannot downgrade to it.
Can't find what you're looking for? Submit a request and we'll add it to our research queue.