Does the iPhone X or older get iOS 27?

No. iPhone X or older does not get iOS 27. iOS 27 supports iPhone 11 and later.

No iOS 27 for this iPhone.

It stays on its current version. It still gets security updates for a while, but none of the features below.

0 yes

0 partly

16 no

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Faster everythingApps launch quicker, keyboard appears faster, AirDrop is faster, smoother Wi-Fi to cellular handoff.
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Refined Liquid GlassCleaner look plus a slider to set how transparent it is.
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Lock Screen tweaksMore control over how the Lock Screen looks and behaves.
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iPhone HandoffSwitch between two iPhones using the same phone number.
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Stronger parental controlsUpdated child safety and screen-time tools.
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New CarPlay featuresSeveral additions across Maps, Music and more.
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Find My privacy optionsNew ways to hide your location from specific people.
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Passport in Wallet (US)Improvements to the digital passport feature.
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Siri AIConversational Siri that knows your Mail, Messages, Notes and Calendar and can do multi-step tasks.
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Siri appA standalone app that keeps your Siri conversations.
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Write with SiriGenerate text or get feedback on your writing anywhere.
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Visual Intelligence in CameraPoint the camera at anything and ask Siri about it.
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AI photo editingNew Apple Intelligence editing tools in Photos.
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Wallpaper ExtendAI fills in the edges of a photo so it fits your Lock Screen.
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Apple Intelligence in Safari, Mail, Passwords, Shortcuts, HomeAI features spread across the built-in apps.
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Apple's most powerful on-device modelThe fastest, most private version of Apple Intelligence runs entirely on the phone.

Any iPhone 15 Pro or newer unlocks every AI feature. An iPhone 11 to 15 gets the update but not the AI.