Every September brings the same question among iPhone users: what’s the new update actually going to bring? This year the answer is iOS 27, and while it doesn’t reinvent the look of the system the way iOS 26 did with its Liquid Glass redesign, it does deliver on a fair few promises that were left half-finished last year. Here’s what you’ll find if you update your phone and which models will be able to install it.
What’s changed since iOS 26
Think of it this way: if iOS 26 laid the foundations, iOS 27 is the finished house. The previous update brought the new visual design and the first steps of Apple Intelligence, but many features fell short or only half worked. Now, a year later, those components are beginning to align.
The star of the show is undoubtedly Siri, rebranded as Siri AI. Apple has teamed up with Google to combine its models with Gemini, and the result is an assistant that holds noticeably more natural conversations and understands what you’re asking for far better. That said, not every handset will get the same experience: on an IPhone 17 Pro Max, for instance, you get the full-fat version of the Apple Intelligence model, while slightly older devices are left with a more limited one.
The rest of the changes are less flashy, but you’ll notice them in everyday use. The Messages app now reads the context of your conversations to suggest replies or actions that actually make sense, without you having to ask. On the visual side, Apple has tweaked the finish on Liquid Glass, bringing better contrast, improved readability and more scope to customise your icons the way you like them. Add in the improvements to parental controls and accessibility, and you’ve got an update that’s more about polishing what was already there than piling on new features for the sake of it.
With that in mind, the next question is whether your iPhone actually makes the cut.
Which models are compatible
Apple’s policy remains the same as ever: any iPhone currently running iOS 26 will have no trouble installing iOS 27, which in practice means the iPhone 11 and every model after it are covered. There’s no need to switch phones every year just to keep getting the latest software, and that’s good news too if you’ve bought a refurbished handset from a platform like Back Market, the largest online marketplace dedicated to refurbished electronics.
That said, installing the update is one thing, and making the most of it is another matter entirely. The most powerful Apple Intelligence features, including the new Siri AI, need a fairly recent chip to run smoothly. This rules out AI features altogether on anything older than the iPhone 15 and keeps the more advanced capabilities reserved for the 17 series and later.
Is it worth updating if you’ve got an older model? Absolutely. You’ll still notice stability improvements, a bit of visual polish and privacy tweaks, even if you miss out on the more capable conversational assistant. Apple usually rolls out the full version in September, timed with the launch of the new iPhones, so it’s a perfect moment to check on your battery’s health and weigh up whether it’s worth holding out for the next model or whether your current phone still has some life left in it.
iOS 27 is really about finally delivering on what Apple promised when Apple Intelligence first launched. A chattier Siri, a more polished design and a fairly wide range of compatible devices make the new operating system a solid update, whether you’re unboxing a brand-new model or sticking with an iPhone that’s been with you for a few years.
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