Apple Intelligence Not Working on iPhone? Fixes (2026)

Apple Intelligence not working on iPhone after updating to iOS 27 almost always traces back to a few causes, and most aren’t bugs. The toggle won’t stay on, Siri sits on “Preparing” for hours, or features do nothing because the model hasn’t downloaded yet. We’ve worked through this on iPhone 15 Pro and iPhone 16 units on the iOS 27 beta, and our iOS 27 AI features guide covers everything you’re trying to unlock.

#Why Is Apple Intelligence Stuck on “Preparing”?

The “Preparing” state is the single most common complaint, and it’s usually expected behavior, not a failure.

When you turn Apple Intelligence on for the first time, your iPhone downloads several gigabytes of on-device models in the background. That download is throttled. According to Apple’s Low Power Mode support page, Low Power Mode pauses automatic downloads and background app refresh to save battery, and the model download is exactly that kind of background task. So even if you’re on fast Wi-Fi, the “Preparing” spinner can sit there indefinitely while the battery icon is yellow.

Turn Low Power Mode off, plug the iPhone in to charge, and leave it on Wi-Fi with the screen locked. In our testing on an iPhone 16, the “Preparing” label cleared within an hour once the phone was charging and off Low Power Mode, after sitting stuck for most of a morning on battery.

The same conditions matter for the download itself, not just the toggle. If you’re hitting other post-update issues alongside this, our iOS 27 beta battery drain guide covers why the first day after an update is rough on battery and background tasks.

#Your iPhone Might Not Support Apple Intelligence

This catches more people than any software fix, because iOS 27 and Apple Intelligence have different hardware floors.

iOS 27 itself runs on iPhone 11 and the second-generation SE and up. Apple Intelligence doesn’t. According to Apple’s “How to get Apple Intelligence” support page, the features require “iPhone 15 Pro models, and iPhone 16 models or later.” That means an iPhone 14, an iPhone 15, or an iPhone 15 Plus will install iOS 27 cleanly and still show no Apple Intelligence settings at all.

The dividing line is the chip and the RAM. The iPhone 15 Pro was the first to ship the A17 Pro with 8 GB of memory, which is what the on-device models need. So if your iPhone is older than the 15 Pro, nothing in this article will turn the feature on, because the hardware can’t run it. Check your model in Settings > General > About, and cross-reference our iOS 27 compatible iPhones guide for the full update list.

If you do have a supported phone but the menu is still missing, the problem is almost always one of the software causes below.

#The Fixes, in Order

Here’s the symptom-to-cause-to-fix map we work through whenever Apple Intelligence won’t turn on after an update. Each row is an independent fix, so you can scan the left column for whatever your iPhone is actually doing and jump straight to the matching cause and fix without working through the others first.

#Fix Storage, Language, and Network

Three of the six fixes are quick settings changes you can make right now. Work through them before you assume the install is broken.

Free up storage. Apple’s support page lists “7 GB of storage on device” as a hard requirement, and a nearly full iPhone makes the download fail quietly. Clear space in Settings > General > iPhone Storage, then re-enable the toggle. Our iPhone storage almost full guide covers what to delete first.

Match your languages. Apple Intelligence only works when, per the same Apple support page, your “device language and Siri language set to the same supported language.” If your phone language is English but Siri is set to another, the features won’t appear. Line them up in Settings > General > Language & Region and Settings > Apple Intelligence & Siri. Apple also notes that changing the Siri language leaves the features unavailable until the new language finishes downloading.

Drop the VPN and stay on Wi-Fi. A restrictive network is a frequent culprit. As macReports’ guide to Apple Intelligence stuck downloading advises, keep the device “on a reliable Wi-Fi network” and plugged in rather than on cellular, and the same guide flags VPN interference and carrier restrictions as common blockers. Turn the VPN off, switch off cellular data for the download, and let plain Wi-Fi carry it.

#Should You Just Restart the iPhone?

Yes, and it’s worth doing before you assume something is broken. A restart clears the stale state that an iOS update can leave behind.

Restart while charging. The order matters a little. Power the iPhone off, wait about 30 seconds, then power it back on while it’s plugged into the charger. macReports recommends this exact power-off-while-charging sequence, and in our testing it’s the step that most often shakes loose a download that’s been idle. If Siri itself is the part misbehaving rather than Apple Intelligence as a whole, our Hey Siri not working guide has the Siri-specific resets.

If a restart, a charge cycle, and free storage still leave you stuck, toggle Apple Intelligence off in Settings, restart once more, then turn it back on to force a fresh download.

#What Apple Intelligence Needs to Run

It helps to know the full checklist, because “not working” usually means one box on this list is unchecked. Apple describes Apple Intelligence as a system of on-device generative models built into iOS, which you can read about on Apple’s Apple Intelligence page.

Here’s the complete requirement set on iPhone:

• An iPhone 15 Pro, iPhone 15 Pro Max, or any iPhone 16 or later
• iOS 27 (or iOS 18.1 and later, where the feature launched)
• 7 GB of free storage for the on-device models
• Device language and Siri language set to the same supported language
• An Apple Account region where Apple Intelligence is available
• Time, Wi-Fi, and power for the first download to finish

Miss any one and the feature looks dead even though the others are fine. Once it’s running, you can move on to the iOS 27 third-party AI guide to pick Gemini, Claude, or ChatGPT as the model behind Siri, or the iOS 26 Apple Intelligence requirements guide if you’re comparing against last year’s rollout.

#Bottom Line

For most people, the fix is the first one: turn off Low Power Mode, plug the iPhone in, and leave it on Wi-Fi for an hour. That alone clears the “Preparing” spinner and the toggle-won’t-stick problem, because the model download is a background task that Low Power Mode actively pauses.

If the menu is missing entirely and you’re on an iPhone 14 or older, stop troubleshooting. The hardware can’t run it.

Everyone else: free up 7 GB, match your languages, drop any VPN, and give it one restart while charging.

#Frequently Asked Questions