Your phone may run iOS 27, but only these devices run everything Siri AI can do

(Image credit: Shutterstock) iOS 27 is now rolling out to compatible iPhones, and a quick glance at the official list tells you that there are a lot of them this year. The thing is, getting the most out of iOS 27 is a lot more than just being able to run the software, and the things you get from iOS 27 will all depend on what kind of hardware your iPhone has on offer.iOS 27 itself works on devices as old as the iPhone 11, which was first released in 2019. The software has the same requirements as iOS 26, so if your phone runs that you should be able to install the latest iOS update without issue. Unfortunately, some of those older devices have to go without Apple Intelligence, while AI-friendly iPhones still won't gain access to everything the new Siri AI has to offer.Here's a rundown on the requirements you need to run iOS 27 and all the different tiers of AI Apple now has to offer.iOS 27 (Image credit: Tom's Guide/Apple/Shutterstock)iOS 27 is available on a crazy 33 different iPhone models, dating as far back as the iPhone 11 and coming all the way up to the newly announced iPhone Duo, iPhone 18 Pro and iPhone 18 Pro Max.Better still, Apple is delivering the update to 30 of those devices today (September 14), letting you upgrade immediately. There are none of the delays of slow-burning rollouts that you'd normally get with Android phones. The only three exceptions are the newest iPhone models, which come running iOS 27 right out of the box.The list of iOS 27 compatible phones is as follows:iPhone 18 ProiPhone 18 Pro MaxiPhone DuoiPhone 17iPhone AiriPhone 17 ProiPhone 17 Pro MaxiPhone 16iPhone 16 PlusiPhone 16 ProiPhone 16 Pro MaxiPhone 16eiPhone 15iPhone 15 PlusiPhone 15 ProiPhone 15 Pro MaxiPhone 14iPhone 14 PlusiPhone 14 ProiPhone 14 Pro MaxiPhone 13iPhone 13 miniiPhone 13 ProiPhone 13 Pro MaxiPhone 12iPhone 12 miniiPhone 12 ProiPhone 12 Pro MaxiPhone 11iPhone 11 ProiPhone 11 Pro MaxiPhone SE (both 2020 and 2022 models)Apple Intelligence (Image credit: Tom's Guide / Shutterstock)Those older iPhones may be able to support iOS 27, but that doesn't mean they are able to use Apple's AI suite — also known as Apple Intelligence. Apple likes to push all AI processing on devices where possible, and that means strict memory requirements. This means any phone that doesn't have at least 8GB of RAM can not run Apple's AI.Sign up to the Tom's AI Guide weekly newsletter summing up all the biggest AI news you need to know. Plus, analysis from our AI editors and tips on how to use the latest AI tools!So far 15 phones can run Apple Intelligence, starting with iPhone 15 Pro:iPhone 15 ProiPhone 15 Pro MaxiPhone 16iPhone 16 PlusiPhone 16 ProiPhone 16 Pro MaxiPhone 16eiPhone 17iPhone 17 ProiPhone 17 Pro MaxiPhone AiriPhone 17eiPhone 18 ProiPhone 18 Pro MaxiPhone DuoAll of those phones are capable of running Siri AI, as are iPads and MacBooks with an Apple M-series chip. However they aren't all able to access everything Siri AI has to offer.Siri AI (Image credit: Tom's Guide)The bulk of Siri AI's features are standard Apple Intelligence features. That means they're available to all iPhones with at least 8GB of RAM. However two of the promised Siri AI features run on Apple's "most powerful on-device model", known as AFM Core Advanced. This model needs at least 12GB of RAM to operate.The specific features are Siri's Expressive Voices and the advanced dictation system. Currently only six iPhones have the hardware necessary to power them:iPhone 17 ProiPhone 17 Pro MaxiPhone 17 AiriPhone 18 ProiPhone 18 Pro MaxiPhone DuoOther Apple devices that run the AFM Core Advanced include iPad Pro (2024 or later), iPad Air (2026 or later), MacBook Pro (2023 or later) and MacBook Air (2024 or later).Siri AI isn't available on iPhones and iPads in the EU and China, over regulatory hurdles. While Apple hasn't spoken about the delay in a Chinese launch, it has made it repeatedly claimed that the European Union's Digital Markets Act is holding upSiri AI's launch in the region — evidently due to regulators not accepting "any of Apple’s proposed solutions to bring Siri AI to the EU while safely supporting other virtual assistants."Like many Apple spats with the EU, it all comes down to the topic of safety and privacy. Apple believes having its rules in place promotes a safer environment, while the European Commission has reportedly disputed those claims. Follow Tom's Guide on Google News and add us as a preferred source to get our up-to-date news, analysis, and reviews in your feeds. Subscribe to Tom's Guide on YouTube and follow us on TikTok. Finally, you can visit our dedicated Tom's Guide Savings Squad hub for expert help on getting the best products for less. More from Tom's GuideiPhone Duo vs Galaxy Z Fold 8 — 7 ways Apple beats Samsung's foldableiPhone Duo could be followed by iPhone Duo Max and iPhone Duo SE — here's what we knowiPhone 18 Pro and Pro Max variable aperture camera explained — here's what it actually does Tom is the Tom's Guide's UK Phones Editor, tackling the latest smartphone news and vocally expressing his opinions about upcoming features or changes. It's long way from his days as editor of Gizmodo UK, when pretty much everything was on the table. He’s usually found trying to squeeze another giant Lego set onto the shelf, draining very large cups of coffee, or complaining about how terrible his Smart TV is.