Yes. The Xiaomi Watch S5 46mm can pair with both Android phones and iPhones through Xiaomi’s Mi Fitness app. Xiaomi Singapore lists Android 8.0 or later and iOS 14.0 or later for that regional model.
Pairing support does not mean every feature works identically on both platforms. Calls, notifications, health sharing and ecosystem features depend on phone permissions, app versions, regional software and, for Xiaomi Smart Hub, the use of a compatible Xiaomi device.
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What phones work with the Xiaomi Watch S5?
Xiaomi’s global support documentation confirms that the Xiaomi Watch S5 46mm connects to Android phones and iPhones using the Mi Fitness app and Bluetooth. The Singapore specification page states the following operating-system thresholds for its listed 46mm model:
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| Phone platform | Listed minimum version | What the listing establishes |
|---|---|---|
| Android | Android 8.0 or later | Compatible for pairing with the Mi Fitness app, subject to phone model and firmware limitations. |
| iPhone | iOS 14.0 or later | Compatible for pairing with the Mi Fitness app, subject to iPhone software and app permissions. |
These are the requirements Xiaomi publishes for that regional product listing, not a guarantee for every future software release or every market. Xiaomi also warns that compatibility can vary by phone model or firmware. Check the specification page for the exact regional watch before buying: Xiaomi Watch S5 46mm specifications.
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The product page and support FAQ refer specifically to the 46mm version. Do not automatically apply these thresholds to another Watch S5 size, a China-market edition or a similarly named model without checking its own documentation.
What “compatible” means in practice
On either platform, the watch can be added to Mi Fitness, receive supported phone alerts and transfer supported health or workout data when the necessary permissions are granted. Bluetooth is used for the phone connection, while Mi Fitness manages the account, device settings, synchronization and many watch features.
Compatibility is not the same as feature parity. A function may require a separate permission, a newer Mi Fitness release, a particular phone manufacturer or a Xiaomi ecosystem device. Calls and messages are especially dependent on permissions, and Apple Health requires an explicit authorization step on the iPhone. Xiaomi Smart Hub has a narrower requirement than ordinary watch pairing and is not documented as a universal Android or iPhone feature.
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Complete these checks before opening the pairing screen:
- Confirm that the phone meets the listed Android 8.0 or iOS 14.0 minimum for the regional 46mm model.
- Install Mi Fitness from the phone’s official app store and sign in to the Xiaomi account you intend to use.
- Turn on Bluetooth. Keep the phone and watch close together during setup.
- Charge the watch sufficiently for setup and updates; a low battery can interrupt pairing or firmware installation.
- Be ready to grant the permissions required by the features you plan to use, rather than denying every request and troubleshooting later.
- Update Mi Fitness when prompted. Xiaomi’s FAQ specifies version 3.54.0 or later on Android and 3.46.0 or later on iOS for workout-data synchronization; newer versions may supersede those figures.
Mi Fitness is the central app for the connection. The official FAQ contains Xiaomi’s current pairing and permission guidance: Xiaomi Watch S5 46mm FAQ.
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How to pair the watch with an Android phone
- Open Mi Fitness and sign in.
- Use the device-add option and select the Xiaomi Watch S5 46mm when it appears.
- Check that the security code shown in Mi Fitness matches the code shown on the watch.
- Confirm the pairing on both the phone and watch screens.
- Accept the requested Android permissions. If you skip one, you can usually enable it later in the phone’s app-permission settings.
- Leave Mi Fitness open while the first synchronization and any firmware update complete.
If the watch does not appear, verify Bluetooth, move the devices closer together and make sure it is not already connected to another phone. A previous pairing may need to be removed from the old phone before a new connection can be completed.
How to pair the watch with an iPhone
The iPhone process has an additional Bluetooth step before you finish in Mi Fitness:
- Open the iPhone’s Settings → Bluetooth and turn Bluetooth on.
- Select the Bluetooth name of the Xiaomi Watch S5 when it appears.
- Accept the pairing request on the iPhone and confirm it on the watch.
- Return to Mi Fitness, choose the watch from the device list and complete the in-app connection.
- Approve Bluetooth, notification and Health permissions that correspond to the features you want.
- Keep the app and watch nearby until initial synchronization finishes.
Pairing only in iOS Bluetooth settings is not enough. Mi Fitness still needs to add the watch so it can manage settings and synchronize data.
Permissions that control calls, messages and alerts
Xiaomi says the Watch S5 setup may request Phone, SMS, Nearby devices, Call logs, Contacts, Notifications, Location and Camera permissions. Each permission has a specific effect:
| Permission | Why the watch or Mi Fitness uses it | Likely symptom when it is denied |
|---|---|---|
| Phone | Call alerts and call-related handling | Incoming-call alerts or call controls do not work. |
| SMS | SMS notifications | Text-message alerts are missing. |
| Nearby devices/Bluetooth | Finding and maintaining the watch connection | The watch cannot be discovered or paired. |
| Call logs | Call-related information used by supported functions | Some call history or call features are unavailable. |
| Contacts | Matching an incoming number to a saved name | The watch shows a number instead of the caller’s name. |
| Notifications | Forwarding app alerts to the watch | App notifications do not appear on the watch. |
| Location | Location-dependent and GPS-related functions | Some location, route or positioning features fail or are less reliable. |
| Camera | QR-code setup and scanning flows | QR-based setup cannot use the camera. |
Android phones may also require storage access, permission to start Mi Fitness automatically and permission for background pop-ups. Android manufacturers place these controls in different menus, so look under Settings → Apps → Mi Fitness, then review permissions, battery use, auto-start and background activity.
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On an iPhone, open Settings → Mi Fitness to review Bluetooth, notifications and other app access. iOS may also stop background activity when an app is force-closed; leave Mi Fitness installed and signed in if you expect regular synchronization.
Connect Xiaomi Watch S5 data to Apple Health
Pairing with an iPhone does not automatically give Mi Fitness permission to write health measurements to Apple Health. Xiaomi’s troubleshooting instructions specify this path:
- Open Settings on the iPhone.
- Go to Apps → Health → Data Access & Devices.
- Select Mi Fitness.
- Enable the categories you want Mi Fitness to read or write, such as heart rate, blood oxygen and sleep data.
- Return to Mi Fitness and keep the Bluetooth connection stable while data synchronizes.
Health categories are individually controlled. Granting one category does not necessarily authorize every other category. If data remains absent, check both the Health permissions and the Mi Fitness device connection before resetting the watch.
Workout synchronization and third-party services
Xiaomi’s FAQ says workout-data synchronization requires Mi Fitness Android version 3.54.0 or later or iOS version 3.46.0 or later. Those version numbers describe the FAQ’s stated requirement and may be replaced by newer app requirements as Xiaomi updates Mi Fitness.
Mi Fitness can also send workout data to supported third-party services when the service is available in your account and region. Xiaomi gives Strava as an example. In Mi Fitness, open Profile → Third-party data, choose the service and complete its authorization. This is separate from Apple Health access: authorizing one does not automatically authorize the other.
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Which features are limited by the phone ecosystem?
Basic watch connection
Android 8.0-or-later phones and iPhones running iOS 14.0-or-later are the platforms Xiaomi lists for basic 46mm compatibility. Notifications, calls, messages and health synchronization still depend on the permissions described above.
Apple Health
Apple Health integration is an iPhone workflow. You must authorize Mi Fitness under iOS Health settings, and the Bluetooth link must remain functional for new measurements to reach the phone.
Xiaomi Smart Hub
Xiaomi Smart Hub is not documented as a feature for any arbitrary Android phone or for iPhone. Xiaomi’s global product page says it requires a Xiaomi phone or tablet that supports the latest compatible Xiaomi HyperOS, along with current versions of Mi Fitness and Xiaomi Home. If you use a non-Xiaomi Android phone or an iPhone, the watch may still pair normally, but you should not expect Smart Hub to be available.
NFC, payments and regional services
Availability of NFC, payment functions, apps and other services can depend on the country, watch edition, phone software and account region. The compatibility documentation does not establish one worldwide feature set, so verify the exact local listing before relying on a payment or region-specific function.
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Troubleshoot the most common connection problems
The watch is not found in Mi Fitness
- Turn Bluetooth off and on, then reopen Mi Fitness.
- Confirm Nearby devices or Bluetooth permission is enabled.
- Move the phone within a short distance of the watch.
- Disconnect the watch from another phone or remove its old Bluetooth entry before trying again.
- Restart both devices and retry the add-device process.
Pairing starts but fails at the security-code step
Compare the code on the watch with the code on the phone. Accept the request on both screens. If the codes do not match, cancel the request rather than accepting it, restart Bluetooth and begin pairing again from Mi Fitness.
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Calls work but caller names do not appear
Enable Contacts permission for Mi Fitness. Phone permission alone does not provide the contact-name access Xiaomi identifies for caller display.
Messages or app notifications are missing
Check SMS and Notifications permissions, then verify that notifications are enabled for the individual apps on the phone. On Android, remove battery restrictions and allow Mi Fitness to run in the background; some phone makers also require auto-start and background-pop-up access.
GPS or location features are unreliable
Enable Location permission for Mi Fitness and allow the phone’s location service when required. Keep the phone and watch connected during setup and synchronization. Location permission affects more than map display; Xiaomi lists it among the permissions used by watch features.
Apple Health contains no new measurements
Open Settings → Apps → Health → Data Access & Devices → Mi Fitness and enable the desired categories. Then check Bluetooth stability and open Mi Fitness so it can complete a sync. Confirm that the app is current before attempting a factory reset.
Workout data does not reach another service
Check the Mi Fitness version against Xiaomi’s FAQ requirement, then open Profile → Third-party data and review the service authorization. Availability can vary by region and account, so a missing service may not indicate a hardware fault.
What to verify before buying
- Confirm that your phone meets the regional listing’s Android 8.0 or iOS 14.0 minimum.
- Check that the product is the 46mm model covered by the cited FAQ and specification page.
- Decide whether you need ordinary pairing or a Xiaomi-only ecosystem feature such as Smart Hub.
- Verify that your country supports the calls, payments, apps or health services you expect.
- Make sure your phone permits Bluetooth, notifications and the health data access required for your use.
The official global product information describes Smart Hub requirements and notes that compatibility can vary by model or firmware: Xiaomi Watch S5 46mm product page.
Bottom line
The Xiaomi Watch S5 46mm is compatible with both Android phones and iPhones when the phone meets Xiaomi’s listed software thresholds and the watch is connected through Mi Fitness. Android pairing is completed in Mi Fitness; iPhone setup starts in iOS Bluetooth settings and finishes in Mi Fitness. Treat permissions, app versions, Apple Health authorization and Xiaomi Smart Hub requirements as separate checks, because successful basic pairing does not guarantee identical features across the two platforms.
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