Smart watch Xiaomi Redmi disconnected from the phone: all the reasons and ways to fix

The problem with disconnecting smart watches from the phone is one of the most common complaints of users Xiaomi Redmi Watch, Mi Band 6/7 The watch is connected, suddenly disconnected, stops syncing data or disappears from the list of associated devices. In most cases, it is not a hardware failure, but a software failure or a setup error.

In this article, we’ll look at all the possible reasons why the Redmi Watch or Mi Band are disconnecting from a Xiaomi phone, from the banal battery drain to hidden firmware conflicts, and give you step-by-step instructions on how to restore stable communication. If you’ve tried to reboot both devices but the problem persists, here you’ll find solutions that aren’t written about in the standard manuals.

Now, if the watch doesn't turn on or respond to charging at all, it's a separate issue with hardware problems, and it's about pairing and syncing with the phone.

1.Discharged battery is the most obvious but often ignored cause

It seems that this is too simple, but more than 30% of requests in support of Xiaomi about turning off the watches are related to battery discharge, the fact that the Redmi Watch and Mi Band at a charge level below 10% automatically turn off the Bluetooth Low Energy module (BLE), And you can have a charge indicator on the screen, but the connection is already broken.

Another nuance: if the watch is dead, it may not be immediately connected after charging, it takes 5-10 minutes to restore the Bluetooth module to work, during which time the Mi Fitness or Zepp Life application may display an error "Device is not available".

• 🔋 Check the charge level on the watch screen (swipe down or press the button).
• ⚡ If the charge is below 15%, connect the watch to charge for at least 30 minutes before re-pairing.
• 🔌 Use only the original cable – non-original cables can undercharge the battery.
• 📱 In the phone settings, turn off the power saving mode for the Mi Fitness app (see section below).

Important point: After the Redmi Watch 3 and Mi Band 7 are completely discharged, time may be lost and they won’t sync until you manually update the date through the app.

Bluetooth problems on the phone: from the on mode of the aircraft to the conflict of devices

If the clock is charged but it's still off, the first thing you need to check is the Bluetooth module on the phone, and there are three types of errors.

1. Hardware (physical malfunction of the antenna).
2. Software (failures in firmware or drivers).
3. Conflicts with other devices (e.g. headphones or speakers).

Let's start with the simplest one:

• 📲 Make sure Bluetooth is on on your phone (swipe down) → quick-setting panel).
• ✈️ Check if the aircraft mode is activated (it turns off all wireless modules).
• 🔄 Reboot Bluetooth: Turn it off for 30 seconds, then turn it on again.
• 🎧 Disable all other Bluetooth-connected devices (earphones, speakers, fitness bracelets).

If the problem persists, try resetting your Bluetooth settings on your phone:

1. Open Settings → Connections and Sharing → Bluetooth.
2. Click on the three dots in the upper right corner → Reset settings.
3. Reboot the phone and re-pair the clock.

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On Xiaomi phones with MIUI 14+ There's a bug: if you turn on "Autophone Connection" in your Bluetooth settings, the watch can turn off when you plug in your headphones!

3. Energy saving modes kill background synchronization

Xiaomi smartphones (especially on the phone) MIUI 12-14) aggressively optimize background processes to save battery life, resulting in the Mi Fitness or Zepp Life app being forced shut down by the system, and the watch being disconnected from the phone after 5-10 minutes without activity.

To fix this, you need to disable optimization for key applications:

1. Open Settings → Applications → Application Management.
2. Find Mi Fitness (or Zepp Life) → Battery limitations.
3. Choose No Limits.
4. Go back and turn on the Auto Start option.

Also check the general energy saving settings:

• 🔋 Go to Settings. → Battery and productivity → Battery mode.
• 🚫 Turn off Super Power Saving or Ultra Mode (if enabled).
• ⚡ In Battery Optimization, add Mi Fitness to the exceptions.

Firmware conflicts: when the watch and the phone "don't understand" each other

If your Redmi Watch 3 or Mi Band 7 has started to shut down after the firmware update (both on your watch and phone), the problem is likely to be version incompatibility.

• 📱 The phone's been upgraded to MIUI 14, and the watch is still on the old firmware.
• ⌚ The watch has received an update, but the phone does not support it (relevant for older models of Redmi Note). 8/9).
• 🔄 There is a bug in the firmware of the watch that causes it to lose communication when synchronizing data.

Decisions:

1. Update the watch firmware: Open Mi Fitness → Device profile → If the update is not available, check the official Xiaomi website for manual firmware.

Firmware rollback

• For Mi Band, you can use the Mi Band Tools utility (requires root rights).
• Redmi Watch is available only through the service center.
• Resetting the clock to factory settings (if nothing helps): Clock settings → System system → Resetting settings → Confirm

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If they stopped connecting after updating the watch firmware, try removing them from the list of devices in Mi Fitness, then reset the watch and re-hide them.

5. Bluetooth interference and weak signal: how to improve communication

Bluetooth Low Energy Module (BLE), If there are obstacles between the phone and the watch (walls, metal objects) or other wireless devices (Wi-Fi routers, microwaves, wireless headphones) are working nearby, communication may periodically break down.

What to do:

• 📶 Make sure the distance between the phone and the watch is less than 10 meters (ideally up to 5 meters).
• 🚪 Avoid metal obstacles (e.g., don’t put your phone in a metal desk drawer).
• 📵 Disable other devices operating at 2.4 GHz (Wi-Fi, wireless mice, cameras).
• 🔄 Switch the Wi-Fi router to channel 1, 6 or 11 (they are least crossed with Bluetooth).

If the problem only occurs in certain places (such as work or the gym), try:

1. Enable High Precision Mode on the phone (in location settings).
2. Disable Wi-Fi Assist (if it automatically switches to mobile data).
3. Use the Bluetooth Auto Connect app to force communication recovery.

Make sure your phone and watch are in the same room.|Disable other Bluetooth devices|Check if the phone is near the sources of interference (router, microwave)|Reboot both devices-->

6.Mi Fitness or Zepp Life app crashes

The official Mi Fitness and Zepp Life apps often cause connectivity problems.

• 🐞 Bug in the latest version of the application.
• 🗃️ Damaged cache or data.
• 🔒 Conflict with other fitness apps (e.g. Google Fit).

How to fix it:

1. Clear the cache and application data: Settings → Annexes → Mi Fitness → Warehouse → Clear the cache / Clear the data ⚠️ Note: After cleaning the data, you will have to re-enter the account and set up the hours.
2. Reinstall the app: Remove Mi Fitness via Settings → Download the latest version from Google Play or App Store.

Turn off sync with Google Fit

• In Mi Fitness go to Profile → Settings → Accounts.
• Turn off Google Fit or Apple Health integration.

If the problem persists, try alternative apps to connect:

• 📱 Notify & Fitness for Mi Band (for Mi Band).
• 📱 Tools & Mi Band (extended settings).

7 Hardware malfunctions: when repairs are not necessary

If you’ve tried all the software solutions but the Redmi Watch or Mi Band is still offline, the problem may be the hardware:

• 🔋 Battery wear (clocks discharge in a few hours).
• 📡 damage to the Bluetooth antenna (for example, after a fall).
• 🔌 Oxidation of contacts (if the watch has been in water).
• 🛠️ Failure of the motherboard (most often after mechanical damage).

How to diagnose:

1. Check if the battery is swelling (if the watch case is deformed).
2. Connect the watch to another phone – if the problem persists, it’s the watch.
3. See if the Bluetooth indicator flashes on the watch (this may indicate a module failure).

Decisions:

• 🔧 If the watch is guaranteed, contact the Xiaomi service center.
• 💰 If the warranty is over, the repair will cost 1,500–3,000 ₽ (Replacement of the Bluetooth battery or module).
• ♻️ For the Mi Band. 6/7 Sometimes it is cheaper to buy a new watch than to repair an old one.

⚠️ Warning: Don't try to disassemble the Redmi Watch yourself - their body is glued together, and if you open it neatly, you can damage the display or battery.

8 Additional causes: from time outage to account conflict

Sometimes the clock is turned off for reasons that users don't even know are obvious.

1. Wrong date and time

If your clock or phone has a time diversion, the sync may be interrupted.

• ⏰ On the phone: Settings → System system → Date and time (must be switched on automatically).
• ⌚ On the clock: in Mi Fitness, update the time manually (if it's lost).

2. Xiaomi Account Conflict

If you're logged in to Mi Fitness under one account and your phone is using another, the clock may shut down.

1. Sign out of all accounts in Mi Fitness.
2. Sign in again using the same account as on your phone.

Regional restrictions

Some Redmi Watch models (especially for the Chinese market) may conflict with global versions. MIUI. If you bought a watch in China, try it:

• Change the region in your phone settings to China.
• Use the Chinese version of Mi Fitness (you can download from the Mi App Store).

4. Viruses or malware

If you have pirated apps or malicious apps installed on your phone APK, They can block Bluetooth, check your phone with antivirus software (such as Malwarebytes) and remove suspicious software.

FAQ: Frequent questions about connecting Xiaomi Redmi watches