Aqara U400 iPhone Compatibility: Which Devices Unlock Hands-Free?

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Aqara U400 hands-free unlocking needs a compatible UWB-equipped iPhone or Apple Watch, not merely an Apple device with Wallet. An iPhone 11 can qualify while an iPhone 16e cannot. Tap-to-unlock has broader compatibility. Check each person’s device before paying for an approach-unlocking feature that only part of your household can use.

Which iPhones and Apple Watches unlock hands-free?

Use the table as a hardware check, then verify software and home-key setup below. “Hands-free” means approaching with an authorized device; “tap” means bringing it to the lock’s NFC reader. Neither is the same as pressing Unlock in an app.

Device	U400 hands-free eligibility	Buying implication
iPhone 11, 12, 13 or 14 family	Yes, with required software and setup	A newer Pro phone is not required.
iPhone 15 and later UWB-equipped models, including iPhone Air	Yes; exclude 16e and 17e	Check the full model name, not its release year.
iPhone SE, iPhone 16e or iPhone 17e	No	Do not budget for phone-based approach unlocking.
iPhone XS	No; tap is supported with required software	Consider whether tapping is enough.
Apple Watch Series 6 and later; Apple Watch Ultra family	UWB-equipped; required software and setup still apply	Check the watch as well as the phone.
Apple Watch SE	No	An SE watch does not add hands-free access.
Apple Watch Series 4 or 5	No; tap is supported with required software	Wrist tap and walk-up entry are different features.

The hardware distinctions come from Apple’s UWB device list and Aqara’s U400 compatibility footnotes. Apple lists both first- and second-generation UWB devices; second-generation UWB is not a U400 prerequisite. UWB availability also varies by country, so international buyers should check Apple’s regional restrictions before importing a lock.

Software requirements: note the documentation mismatch

Aqara’s U400 manual lists iOS 18.5 or later for hands-free iPhone access and watchOS 11.5 or later for supported watches. It gives a separate tap-to-unlock minimum: iPhone XS or later with iOS 17.1 or later, and Apple Watch Series 4 or later with watchOS 10.1 or later.

However, the newer pairing guide on Aqara’s forum specifies iOS 18.6 or later and explicitly excludes iPhone 17e. Our buying advice is to update to the latest supported stable software for your devices rather than plan an installation around iOS 18.5. If you must retain a particular OS version, get that exact combination confirmed by Aqara before ordering.

A software update cannot add missing UWB hardware. Conversely, do not replace an eligible older phone just because a newer model exists. The practical question is whether your current device meets the feature requirements and can run the necessary software.

Tap, fingerprint and passcode remain useful alternatives

Apple’s home-key guide explains that Express Mode removes the authentication step when using a home key. You still bring the device near the lock for a tap. Express Mode alone is not evidence that an unsupported phone will unlock from your pocket.

Aqara also lists fingerprint, keypad passcode, NFC card and mechanical-key entry on its U400 product page. These give a household ways to share one door without everyone owning identical phones. A fingerprint avoids taking out a phone, but you still touch the lock; a passcode avoids needing a personal device at the door.

Our recommendation: assign each person a preferred entry method and a backup before buying. A household that likes fingerprint entry may get little extra daily value from upgrading phones for UWB. A person regularly carrying bags may value approach unlocking much more. Treat those as different needs rather than declaring one method best for everyone.

The Apple hub belongs in your compatibility budget

For the advertised Apple hands-free setup, Aqara requires a Thread-enabled Apple home hub. Its pairing guide lists HomePod mini, HomePod second generation, Apple TV 4K second generation, and Apple TV 4K third generation with Wi-Fi + Ethernet. Check the exact model of an existing Apple TV before counting it as suitable.

An Aqara hub bundled with a lock is not a replacement for that Apple requirement. Equally, do not automatically buy two hubs: the manual allows local Aqara Home features over Bluetooth without an Aqara hub, while an Aqara Matter controller adds its remote features and automations. Buy additional hardware for a specific function you actually want.

Keep the shopping calculation simple: lock, any missing Apple hub, and any device upgrade you were not already planning. If those extras change the value proposition, pause. Our Matter smart-lock hub guide covers the wider network question; the point here is what your household needs for Apple approach unlocking.

Mixed iPhone and Android households: check each wallet separately

Do not dismiss U400 as Apple-only. Aqara’s current product page advertises Samsung Wallet Digital Home Key through SmartThings, and its official Samsung announcement confirms NFC tap access on supported Galaxy devices. That is a separate path from Apple home key.

Nor should you assume every UWB Android phone gets the same walk-up experience. Samsung’s compatibility matrix separates NFC and UWB support by device, OS and region. Its Digital Home Key announcement also makes availability dependent on the lock and rollout. Before buying specifically for Samsung hands-free entry, confirm the exact U400 firmware, Galaxy model and regional support; a general Aliro or Matter logo is insufficient.

For a mixed household, evaluate the experience person by person. One resident’s Apple hands-free access does not make the Android resident’s workflow identical. If everyone needs pocket-only entry, unresolved compatibility is a reason to wait, not a reason to assume a promised update has arrived.

Our buying verdict

U400 makes the clearest sense when the people who want hands-free entry already have eligible Apple devices and a suitable hub. When buying it would also require replacing phones or watches, compare the complete upgrade cost with keeping tap, fingerprint or passcode entry.

For the lock’s broader strengths and trade-offs, read our Aqara U400 review. If you have confirmed your Apple setup and are choosing between locks, continue to U400 versus Schlage Sense Pro.

Frequently asked questions

Will iPhone 16e or 17e unlock U400 hands-free?

No. Apple excludes both from its UWB-equipped iPhone list. Buying a newer phone is not enough if it is an excluded model. Choose another supported entry method rather than expecting a software update to supply the missing radio.

Does Apple Watch SE make an unsupported iPhone hands-free?

No. Aqara excludes Apple Watch SE from hands-free home-key support. A supported UWB watch is a different case, but check its phone pairing, software and home-key setup before buying a watch as a workaround.

Why can I tap my device but not unlock on approach?

Tap and approach access have different hardware and software requirements. On an eligible device, the U400 manual also requires Unlock on Approach to be enabled in the home key’s Wallet settings. Confirm those prerequisites before assuming the lock needs replacing.

Does everybody need an iPhone to use the same U400?

No. Fingerprint and passcode entry allow different household workflows, and supported Samsung devices have a separate Wallet route. Agree on each person’s actual entry method before buying; do not promise identical hands-free behavior across every phone.

Should I upgrade my phone just for this lock?

Usually, compare alternatives first. If your current entry method already works well, a lock-plus-phone purchase needs a stronger justification than a lock-only purchase. Upgrade for hands-free entry only when the convenience matters enough to you and the complete setup is verified.