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Yes. Xiaomi documents the Xiaomi Watch S5 46mm as compatible with both Android phones and iPhones through the Mi Fitness app. Xiaomi Singapore lists Android 8.0 or later and iOS 14.0 or later for that regional 46mm model. Pairing is supported on both platforms, but some functions have different permission requirements, and Xiaomi Smart Hub is limited to supported Xiaomi phones or tablets running the required HyperOS software.
Before buying, confirm that your exact regional model and phone meet the current requirements. Xiaomi says compatibility can vary by phone model or firmware. The following setup uses Xiaomi’s official Xiaomi Watch S5 46mm FAQ, Singapore specifications, and global product information.
What phones are compatible with the Xiaomi Watch S5?
The Xiaomi Watch S5 46mm can pair with an Android phone or an iPhone using Xiaomi’s Mi Fitness app and Bluetooth. The listed operating-system thresholds are:
| Phone platform | Minimum version listed by Xiaomi Singapore | Connection method | Important qualification |
|---|---|---|---|
| Android | Android 8.0 or later | Mi Fitness app and Bluetooth | Phone model, firmware, permissions, and background-operation settings can affect individual features. |
| iPhone | iOS 14.0 or later | iPhone Bluetooth settings, then Mi Fitness | Bluetooth, notification, and Apple Health permissions must be granted separately where required. |
These are the requirements published for the 46mm listing in Singapore, not a guarantee for every market or every future software release. Check the product page for your country and the current Mi Fitness version before purchase. Basic pairing does not mean every watch feature behaves identically on Android and iOS.
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What you need before pairing
Compatible phone and software
- Use an Android phone running version 8.0 or newer, or an iPhone running iOS 14.0 or newer, according to Xiaomi’s Singapore specifications.
- Install Mi Fitness from the appropriate app store and sign in if the app requests an account.
- Update Mi Fitness before troubleshooting. Xiaomi’s FAQ specifically states that workout-data synchronization requires Mi Fitness for Android version 3.54.0 or later, or the iOS version 3.46.0 or later. Those version notes may be superseded as the app changes.
- Turn on Bluetooth. Keep the phone close to the watch during initial setup and subsequent synchronization.
Permissions that affect watch features
Xiaomi’s FAQ says: “When connecting the Xiaomi Watch S5 46mm to the Mi Fitness App, the following permissions should be enabled: Phone, SMS, Nearby devices, Call logs, Contacts, Notifications, Location, and Camera.” Enable only the permissions needed for the functions you intend to use, but understand that denying one can disable the related feature.
How to pair the watch with an Android phone
- Enable Bluetooth on the Android phone and open Mi Fitness.
- In Mi Fitness, choose the option to add or select a device, then select the Xiaomi Watch S5 when it appears.
- Compare the security code shown on the phone with the code on the watch.
- Confirm the matching code and accept the pairing request on both the phone and watch.
- Allow the requested permissions in Android settings and Mi Fitness. Without Nearby devices or Bluetooth access, the watch cannot complete pairing.
- Leave Mi Fitness allowed to operate in the background if you want reliable call, message, notification, location, or synchronization behavior. Xiaomi also identifies storage, auto-start, and background pop-up permissions as relevant Android settings.
If the watch appears in Android Bluetooth settings but not in Mi Fitness, remove the incomplete Bluetooth pairing, restart Bluetooth, and start the process again from Mi Fitness. The app is the place where the watch account connection is completed.
How to pair the watch with an iPhone
- Turn on Bluetooth on the iPhone and keep the watch nearby.
- Open iPhone Settings → Bluetooth, find the watch’s Bluetooth name, select it, and accept the pairing request on both screens.
- Return to Mi Fitness, choose the Xiaomi Watch S5, and complete the connection in the app.
- Approve Bluetooth and notification access when iOS asks. These permissions are separate from the initial Bluetooth pairing.
- If you want health metrics in Apple Health, authorize Mi Fitness in the Health settings described below.
The iPhone sequence is therefore different from Android: Bluetooth settings are used first, followed by Mi Fitness. Pairing only in iOS Bluetooth settings is not the complete setup.
Which permissions control calls, texts, notifications, and GPS?
A watch can be paired successfully while individual functions remain unavailable. Check the permission associated with the feature that fails rather than repeating the entire pairing process.
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| Phone permission | What Xiaomi says it affects | What to check |
|---|---|---|
| Phone | Call alerts and call handling | Allow Mi Fitness to access phone-related functions. |
| SMS | SMS alerts | Enable SMS access if text-message notifications are required. |
| Nearby devices or Bluetooth | Pairing | On Android, allow Nearby devices; on iPhone, keep Bluetooth access enabled. |
| Call logs | Call-related integration | Grant access if requested by Mi Fitness for calling features. |
| Contacts | Caller-name display | Allow contacts access if you want names instead of only numbers. |
| Notifications | App notifications on the watch | Enable notification access in the phone’s settings and in Mi Fitness. |
| Location | Some GPS-related functions | Allow location access at the level required by the feature and phone OS. |
| Camera | QR-code setup | Permit camera access when the setup flow uses a QR code. |
On Android, Xiaomi additionally calls out storage, auto-start, and background pop-up permissions. Phone manufacturers use different names and battery-management menus for these controls, so look in the app’s permissions and battery settings if synchronization stops when Mi Fitness is not open.
How to sync the Xiaomi Watch S5 with Apple Health
Apple Health access is optional, but it is required if you want supported watch measurements to appear in the iPhone’s Health database. Xiaomi’s troubleshooting instructions use this path:
- Open Settings on the iPhone.
- Tap Apps → Health → Data Access & Devices.
- Select Mi Fitness.
- Enable the health-data categories you want Mi Fitness to read or write.
- Keep the Bluetooth connection stable while data is transferred.
Xiaomi specifically mentions health metrics such as heart rate, blood oxygen, and sleep as examples of data that can sync to Apple Health when access is enabled. If no data appears, verify both the Mi Fitness permissions in Health and the Bluetooth connection before changing other settings.
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The Xiaomi FAQ says workout-data synchronization requires Mi Fitness for Android 3.54.0 or later, or Mi Fitness for iOS 3.46.0 or later. If your app is older, update it before diagnosing missing workouts.
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Xiaomi also says workout data can synchronize to third-party services through Mi Fitness. Its example is Strava, configured in Mi Fitness → Profile → Third-party data. You must authorize the service, and the option can depend on availability in your version or region of the app. Pairing the watch alone does not automatically authorize a third-party account.
What does not work on every compatible phone?
Xiaomi Smart Hub
Xiaomi Smart Hub has narrower requirements than ordinary watch pairing. Xiaomi’s global product information says it requires a Xiaomi phone or tablet that supports the latest compatible Xiaomi HyperOS, together with current versions of Mi Fitness and Xiaomi Home. An iPhone or a non-Xiaomi Android phone may pair with the watch but should not be assumed to support Smart Hub.
Region-specific functions
Do not generalize NFC, payment, or other market-specific functions from the fact that Bluetooth pairing works. Availability can depend on the watch’s sales region, phone model, firmware, account, and local services. Check the documentation for the exact regional edition before relying on one of those functions.
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Troubleshooting pairing and missing features
The watch cannot be found
- Confirm Bluetooth is on and the watch is close to the phone.
- On Android, verify Mi Fitness has Nearby devices permission. On iPhone, verify Bluetooth access for Mi Fitness.
- If the watch was previously paired, remove the old or incomplete entry and retry from the correct setup flow.
- Update Mi Fitness and restart both devices before trying again.
The security code does not match
Cancel the request rather than accepting an unexpected code. Restart the pairing process and confirm that the code on the phone exactly matches the code displayed on the watch.
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Calls or caller names do not appear
Check Phone, Call logs, and Contacts permissions. Phone permission affects call alerts and handling; Contacts permission is needed for caller-name display. Also make sure notifications are enabled if the problem is an incoming-call alert rather than call control.
Texts or app notifications are missing
Enable SMS permission for text alerts and Notifications permission for app alerts. On Android, review auto-start, background, and battery restrictions that can stop Mi Fitness from running when the screen is off.
Location or workout data is incomplete
Check Location permission for GPS-related features, keep Bluetooth stable, and confirm that your Mi Fitness version meets Xiaomi’s stated synchronization versions. For iPhone health data, revisit Settings → Apps → Health → Data Access & Devices → Mi Fitness and enable the required categories.
Apple Health remains empty
Pairing does not grant Health access automatically. Authorize Mi Fitness in Apple Health, keep Bluetooth connected, and allow time for synchronization. If the app is below iOS version 3.46.0, update it before further troubleshooting.
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Should you buy the Xiaomi Watch S5 for an iPhone?
Yes, if your priority is basic watch pairing, notifications, supported calls and messages, workouts, and health-data synchronization through Mi Fitness, and your iPhone meets the listed iOS requirement. Expect a more permission-driven setup than a simple Bluetooth accessory, especially for Apple Health.
An Android buyer has the same basic compatibility, with Android 8.0 or newer listed for the 46mm model. Android may expose additional manufacturer-specific background and auto-start controls that need adjustment. A Xiaomi phone or tablet running supported HyperOS is the safer choice if Smart Hub is important; that feature should not be treated as an iPhone capability.
Bottom line on Xiaomi Watch S5 compatibility
The Xiaomi Watch S5 46mm works with both iPhone and Android phones through Mi Fitness. Use Android 8.0+ or iOS 14.0+ as the listed regional thresholds, follow the platform-specific pairing sequence, and grant the permissions required by each feature. Basic compatibility is broad, while Smart Hub and some region-dependent functions have narrower Xiaomi-device or software requirements.
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