What mobile phone bindings does Xiaomi Watch S3 support and how do I bind them?

Before using Xiaomi Watch S3, you need to first bind it to the Mi Fitness App. The app’s name is the same for IOS and Android systems, and it can be searched and downloaded in the App Store. After binding, the app needs to be locked in the background to avoid being shut down by the system, which may cause disconnection from the mobile phone, affecting the normal use of the watch.
The binding method is as follows:
1. Press and hold the power button for about 3 seconds to turn on the watch. Use your phone to scan the QR code on the watch screen, or search for the Mi Fitness App in the mobile app market. Download and install the Mi Fitness App;
2. Open the Mi Fitness App, follow the prompts on the page to log in to the account, and enable the relevant permissions required for the app;
3. The watch supports three ways of adding:
(1). Tap [Scan] to scan the QR code on the watch screen;
(2). Tap [Add Device] and the app will automatically search for devices that can be added. In the list of devices found, select the Bluetooth name of your watch. If your watch is not found in the list, you can try searching again;
(3). Tap [Add Device] >> tap [Add by Model] at the bottom of the page >> select [Xiaomi Watch S3], and the App will automatically search for Xiaomi Watch S3 that can be added. In the list of devices found, select the Bluetooth name of your watch. If your watch is not found in the list, you can try searching again;
4. Android phone: When the phone displays the same security code as the watch screen, it can complete the pairing connection with the watch by tapping [pairing request] on both the phone and watch;
5. iOS mobile phone: First, go to the Bluetooth list in the mobile phone system, select the Bluetooth name of your watch, and agree to the pairing request on the security code pages that pop up on your phone and watch. Return to the app and select the Bluetooth name of your watch, then perform another pairing operation to complete the pairing connection with the watch.
Note:
During the pairing process, please confirm that the Bluetooth of the phone is turned on to ensure that the connection between the watch and the phone is normal.
If the security code has popped up on the watch but the confirmation pairing pop-up is not displayed on the phone, please search for pairing requests in the notification bar of the phone.
If the watch cannot be found during the device addition process or cannot be connected during use, please try to press and hold on the watch power button for 3 seconds, select restore to factory on the system operation interface, and then adding the watch again.