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MacworldUnsure which version of iOS your iPhone can run? Heres a quick guide so you can find out if your iPhone is compatible with the most recent iterations of the iPhone operating system, and, if it isnt, which version you can install on your iPhone. Apple gives iOS a major update each year, usually introducing new features and some stability upgrades to the previous version, plus numerous smaller updates in between. iOS 18 arrived on September 16, but since then there have been multiple updates, including iOS 18.3 in January 2025. The good news is that the compatibility list foriOS 18is the same as iOS 17, so those with the iPhone XR, XS or 2nd gen SE will get to enjoy iOS 18. However, to use the new Apple Intelligence features in iOS 18, youll need the iPhone 16, 16 Plus, 16 Pro or 16 Pro Max, iPhone 16e, or the iPhone 15 Pro or iPhone 15 Pro Max.When Apple introduces iOS 19 later in 2025 we expect it to support every phone supported by iOS 18. Thats all phones sold since 2018. However, as with iOS 18 many Apple Intelligence features will not be available for older iPhones.Although Apple is better than most at keeping older models on the list of supported devices, hardware limitations can sometimes mean that an iPhone gets left behind. This doesnt mean the device will stop working, but you wont be able to access the newer features and capabilities that come with the updated software and you may be vulnerable to security flaws. If your iPhone cant run one of Apples supported versions of iOS then its probably time to upgrade your iPhone. To find out more read how long Apple supports the iPhone for. If you want to see a brief history of iOS, then take a look at our guide to Every version of iOS released so far.Latest iOS version supported by each iPhoneTo show you which version of iOS your iPhone can run, weve broken down each iPhone generation so you know which version it originally shipped with (as that will be the earliest it can run) and the latest iteration it currently supportsincluding whether that iPhone will support iOS 18. Weve not listed the smaller point releases, as they change all the time, so take it as understood that any version of iOS that the iPhone is shown as supporting (such as iOS 16) also means any smaller point updates too (such as iOS 16.4.1). It should be noted that Apple has stopped supporting a lot of the older versions of iOS now, meaning there are no new security patches for them. Alongside the latest iOS, Apple usually supports two (or sometimes three) generations of the iPhone operating system with security updates. Since September 2024: iOS 17 is the oldest supported version of iOS. The last version of iOS 16 was released in August 2024.This means that Apple has now ended support for the iPhones X, 8 and 8 Plus as it is no longer issuing security updates for iOS 16. With the end of support for iOS 15 (last updated in July 2024), the iPhones 7, 6S, 6S Plus and 1st gen SE has also ended.iOS 18 supports the same iPhones that were able to run iOS 17, so Apple is likely to end support for that version with the arrival of iOS 19 later in 2025. The last security update for iOS 17 was in November 2024. Every version of iPhone and the iOS it supports.FoundryiPhone 16, 16e, 16 Plus, 16 Pro, 16 Pro MaxOriginal iOS version: iOS 18Does it run iOS 18: YesiPhone 15, 15 Plus, 15 Pro, 15 Pro MaxOriginal iOS version: iOS 17Does it run iOS 18: YesiPhone 14, 14 Plus, 14 Pro, 14 Pro MaxOriginal iOS version: iOS 16Does it run iOS 18: YesiPhone 13, 13 mini, 13 Pro, 13 Pro MaxOriginal iOS version: iOS 15Does it run iOS 18: YesiPhone SE (3rd generation)Original iOS version: iOS 15Does it run iOS 18: YesiPhone 12, 12 mini, 12 Pro, 12 Pro MaxOriginal iOS version: iOS 14Does it run iOS 18: YesiPhone 11, 11 Pro, 11 Pro MaxOriginal iOS version: iOS 13Does it run iOS 18: YesiPhone SE (2nd generation)Original iOS version: iOS 13Does it run iOS 18: YesiPhone XR, XS, XS MaxOriginal iOS version: iOS 12Does it run iOS 18: YesiPhone XOriginal iOS version: iOS 11Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 16 iPhone 8, 8 PlusOriginal iOS version: iOS 11Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 16 iPhone 7, 7 PlusOriginal iOS version: iOS 10Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 15 iPhone 6S, 6S PlusOriginal iOS version: iOS 9Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 15 iPhone SE (1st generation)Original iOS version: iOS 9Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 15 iPhone 6, 6 PlusOriginal iOS version: iOS 8Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 12 iPhone 5SOriginal iOS version: iOS 7Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 12 iPhone 5C Original iOS version: iOS 7Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 10 iPhone 5Original iOS version: iOS 6Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 10 iPhone 4s Original iOS version: iOS 5Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 9 iPhone 4Original iOS version: iOS 4Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 7 iPhone 3GSOriginal iOS version: iOS 3Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 6 iPhone 3GOriginal iOS version: iOS 2Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 4 iPhone Original iOS version: iOS 1Does it run iOS 17 or iOS 18: NoLast compatible version: iOS 3 If your iPhone isnt supported by iOS 18, 17, or 16 then you might want to consider upgrading to a newer device. Take a look at our best iPhone deals round-up where we share the most recent money-saving deals. Read our best iPhone guide for advice.How to tell which version of iOS youre runningIf youre not sure which version of iOS youre currently running, its very easy to find out. OpenSettings.Tap on General.Tap Aboutand look for theiOS Versionnumber.The number youre looking for will be something like 16.0 or 15.3.1. Dont worry about the bit in parentheses.FoundryHow to upgrade iOSNow that you know the latest version of iOS that your iPhone supports, its a good idea to make sure youre running on that platform. We have a guide on how to update iOS on your iPhone, so take a look at that and follow the simple instructions to get your iPhone up to date.