Smart watches Redmi Watch 12 have become a popular accessory due to the combination of functionality and affordable price. However, many users encounter difficulties when connecting to a smartphone for the first time—especially when it comes to budget phone models or non-standard firmware. This article will help you figure out how to properly pair devices via Android - especially when we are talking about budget phone models or non-standard firmware. This article will help you figure out how to properly pair devices via Bluetooth, avoid common mistakes and set up synchronization for maximum convenience.

The connection between the watch and the phone provides access to notifications, health monitoring, music control and even contactless payments (if the model supports NFC). But before you begin, make sure that your Redmi Watch 12 is charged at least 30% - if the battery level is low, the pairing process may be interrupted. Also check that you have the latest version of the application installed on your phone Mi Fitness (formerly known as Xiaomi Wear) - without it, full operation of the watch is impossible.

📊 Which Redmi Watch 12 function do you use most often?
Notifications
Sleep monitoring
Pedometer
Music control
Heart rate monitor

1. Preparing your phone and watch for pairing

Before connecting, you must complete several mandatory steps on both devices. Start with your phone:

  • 📱 Update the Android firmware. Go to Settings → System → System update and install all available patches. Outdated versions of the OS may not support the protocols Bluetooth 5.0+that use Redmi Watch 12.
  • 🔄 Restart the phone. This will clear the cache Bluetooth-module and eliminate possible conflicts with other connected devices.
  • 🛡️ Turn off VPNs and firewalls. Some security apps (such as Avast or Kaspersky) block communication between your watch and your phone.

Now prepare your watch:

  1. Charge Redmi Watch 12 to a level of at least 50% - this guarantees stable operation during setup.
  2. If the watch has already been connected to another device, perform a reset: go to Settings → System → Reset settings.
  3. Make sure that the watch is in discovery mode. To do this, swipe down on the screen and check the icon Bluetooth —it should blink.
⚠️ Attention: If a message is displayed on the watch screen, but synchronization does not work, delete all previous pairings in the settings "Connected to Mi Band", but synchronization does not work - delete all previous pairings in settings Bluetooth of the phone. Old "ghost" connections often cause conflicts.

2. Installing and setting up the Mi Fitness application

Official application Mi Fitness is the only way to fully connect Redmi Watch 12 to Android. Download it from Google Play or, if your phone does not support Google services (for example, Huawei without GMS), use the APK from the official website Xiaomi.

After installation:

  1. Open Mi Fitness and register through an account Xiaomi (or log in if you already have one). Without authorization, data synchronization will not work.
  2. Click "Add device" in the upper right corner and select "Wrist devices" → "Redmi Watch 12".
  3. Allow the application to access Bluetooth, notifications, contacts and geolocation (the latter is needed for accurate tracking of runs).

If the application does not find the watch, try:

  • 🔍 Turn off and turn on again Bluetooth on the phone.
  • 📵 Restart Mi Fitness via the task manager.
  • 📱 Make sure that the watch is not connected to another device (for example, a tablet).

Bluetooth is turned on on the phone

The Mi Fitness application is installed

The watch is charged ≥30%

Old pairings have been deleted

Access to notifications is allowed-->

3. Step-by-step guide for connecting via Bluetooth

When preparation is completed, proceed to pairing:

  1. Activate search mode on your watch. To do this, press and hold the power button (usually the right side one) for 3 seconds until the icon appears. data-i="110">Settings → Connected devices → Bluetooth Bluetooth.
  2. On the phone open Settings → Connected devices → Bluetooth and press "Add a new device".
  3. In the list of found devices, select "Redmi Watch 12" (or "MIBAND"if the model is not recognized).
  4. Confirm pairing on both devices. A 4-6 digit code will appear on the watch - it must match what is displayed on the phone screen.
  5. After successful connection, return to Mi Fitness and wait for the synchronization to complete (may take up to 2 minutes).

Critical detail: If the watch is not detected as Redmi Watch 12, but are displayed as an unknown device - this is a sign of firmware incompatibility. Update the watch software via Mi Fitness (section "Firmware") or manually download the latest version from the website Xiaomi.

Problem Cause Solution
The watch is not located Bluetooth is turned off or the watch is in sleep mode Wake up the watch with the button, check Bluetooth on the phone
Error "Could not connect" Conflict with other devices Delete all pairings in the Bluetooth settings
Synchronization is interrupted Weak signal or low charge Charge the watch, bring the phone closer
The application does not see the clock Outdated version of Mi Fitness Update the application on Google Play

4. Setting up notifications and data synchronization

After successful connection, configure what notifications will be sent to your watch. To do this:

  1. In Mi Fitness go to "Device Profile" → "Notifications".
  2. Turn on the switches for SMS, calls and applications (for example, WhatsApp, Telegram).
  3. Set up vibration and screen backlight on new notifications.

To synchronize health data:

  • 🏃 Enable automatic synchronization in "Settings → Data synchronization".
  • 📊 Select the refresh rate (recommended every 30 minutes for accurate monitoring).
  • 🔒 Allow access to Google Fit or Apple Health (if you use cross-platform services).
⚠️ Attention: If notifications are duplicated or arrive with a delay, check your settings Android energy saving. Some phones (for example Xiaomi, Samsung) automatically limit background activity Mi Fitness. Add the application to the exceptions in the section "Battery → Energy consumption optimization".
💡

To ensure that notifications are displayed correctly, disable "Adaptive notifications" in the Android settings (section Applications → Notifications → Advanced). This function sometimes blocks text transmission to the watch.

5. Solving common connection problems

Even after successful pairing, users encounter common errors. Here's how to fix them:

🔴 Problem: The watch connects, but the data is not synchronized

  • Check whether auto-sync auto-sync is enabled Mi Fitness.
  • Restart the application and reconnect the watch.
  • Update the watch firmware via "Settings → Software Update".

🔴 Problem: Bluetooth constantly turns off

  • Disable power saving mode for Mi Fitness in the battery settings.
  • Check if the antivirus is blocking the connection.
  • Reset the network settings on your phone (Settings → System → Reset → Reset Wi-Fi, mobile network and Bluetooth).

🔴 Problem: The watch does not vibrate for notifications

  • Make sure that Mi Fitness is turned on vibration and sound signals.
  • Check whether the phone is in Do Not Disturb mode.
  • Reconnect the watch via Bluetooth settings → Redmi Watch 12 → Forget device, then repeat pairing.
What to do if the watch does not respond to the sensor after connecting?

If the screen Redmi Watch 12 stops responding to touches after synchronization, this may be caused by a firmware conflict. Try:

1. Hard reboot the watch (hold the power button for 10 seconds).

2. Reset settings via Mi Fitness (Device profile → Reset).

3. Update the software manually by downloading the file from the [official Xiaomi forum](https://new.c.mi.com) (account required).

6. Optimizing watch operation to save battery

Continuous Bluetoothconnection and data synchronization drains the battery of both the watch and the phone. To extend battery life:

  • ⚡ Disable Continuous heart rate monitoring (select a measurement interval every 10-30 minutes instead of continuous). Mi Fitness select a measurement interval of once every 10–30 minutes instead of continuous).
  • 📴 Reduce the watch screen brightness to 50–60%.
  • 🔔 Limit notifications to only important applications (such as calls and SMS).
  • 🔄 Turn on automatic shutdown Bluetooth on your phone at night (via Settings → Connected devices → Schedule).

Average operating time Redmi Watch 12 on one charge:

Usage mode Autonomy
Basic (pedometer, time) 10–12 days
With notifications and heart rate monitor 5–7 days
With GPS and constant synchronization 2-3 days
💡

For maximum autonomy, disable background updating of weather and currency rates in the settings Mi Fitness. This data is rarely needed on the watch, but consumes a lot of energy.

7. Alternative connection methods (if Bluetooth does not work)

If pairing via Bluetooth is impossible due to hardware problems, try alternative methods:

🔄 Connecting via Wi-Fi (for firmware)

Some models Redmi Watch support software updates via Wi-Fi. To do this:

  1. Connect your watch and phone to the same Wi-Fi network.
  2. In Mi Fitness go to "Device profile → Software update".
  3. Download the firmware and wait settings (do not disconnect the watch from charging!).

📱 Using third-party applications

If Mi Fitness does not work, try:

  • Notify & Fitness for Mi Band — supports most functions, including notifications.
  • Tools & Mi Band — allows you to customize the interface hours.

Please note: third-party applications may not support all functions (for example, SpO₂ or stress test).

⚠️ Attention: When using unofficial firmware or applications, you risk losing your warranty watch. Xiaomi is not responsible for damage caused by third-party software.

8. Frequently asked questions and answers

❓ Is it possible to connect the Redmi Watch 12 to an iPhone?

Officially - no. Mi Fitness for iOS does not support full synchronization with Redmi Watch 12. You will be able to connect via Bluetooth for call notifications, but health and step data will not be synced. For iPhone, it is better to consider Apple Watch or Amazfit with iOS support.

❓ Why does the clock turn off when the phone is locked?

This is due to optimization of Android power consumption. To fix:

  1. Go to Settings → Applications → Mi Fitness → Battery.
  2. Select "No restrictions".
  3. Disable "Battery optimization" for the application.
❓ How to reset your watch if it does not respond?

Perform a hard reset:

  1. Charge the watch to at least 20%.
  2. Press and hold the power button for 15-20 seconds until the logo appears Redmi.
  3. After rebooting, the watch will be like new - you will need to reconnect.

If this does not help, connect the watch to the charger and hold the button 30 seconds.

❓ Is it possible to use the watch without a phone?

Yes, but with limitations. Redmi Watch 12 can work autonomously in the mode:

  • 🕒 Clock/alarm;
  • 🏃 Pedometer (data is saved and synchronized when connected to the phone);
  • ❤️ Heart rate monitor (measurements every 30 minutes).

However, notifications, GPS tracking and weather updates require connection to a smartphone.

❓ Why did they disappear after the update? some functions?

Sometimes new firmware disables certain features (for example, control gestures or custom watch faces). To return them:

  1. Check the settings in Mi Fitness —the option may have been moved to another section.
  2. Roll back the firmware via "Software update → Return to previous version" (if available).
  3. Write to support Xiaomi through the app - sometimes functions are returned based on user requests.