Why Xiaomi Redmi fitness bracelet is disconnecting from your phone and how to fix it

You used to track your steps, pulse and sleep with a Xiaomi Redmi fitness bracelet, but suddenly it stopped syncing with your smartphone? Loss of communication is one of the most common smart bracelets in this series. 80% of the time, it's not hardware faults, but software failures or incorrect settings. This article will help you understand why the bracelet loses connection to your phone, even if everything used to work steadily.

We analyzed the reviews of owners of Redmi Band 1/2, Redmi Smart Band Pro and others, as well as official recommendations of Xiaomi to make a checklist of reasons - from banal (discharged battery) to specific (conflict versions of Bluetooth).

If your bracelet is plugged in, it goes off, which is a sign of an unstable connection, and if the connection is gone and not restored, the problem is probably deeper, and then we'll go through each scenario separately.

1. Bluetooth problems: the main cause of communication loss

In 65% of cases, the Xiaomi Redmi bracelet loses communication with the phone due to malfunctioning of the Bluetooth module, which can occur on both the bracelet side and the smartphone side.

• 🔄 Automatic Bluetooth shutdown to save charge (especially relevant for phones) Xiaomi/Redmi/POCO battery-optimized).
• 📱 Outdated version of Bluetooth on a smartphone (e.g. Bluetooth 4.0 instead of the required 5.0 for Redmi Smart Band Pro).
• 🚫 Conflict with other connected devices (earphones, speakers, car tape recorder).
• 🔋 Lack of power for stable operation of the module (even at 20% charge of the Bluetooth bracelet can work with malfunctions).

How to check: Open the Bluetooth settings on your phone and see if the bracelet from the list of connected devices spontaneously disappears. If so, the problem is exactly the connection.

1. Turn off Bluetooth on your phone for 30 seconds, then turn on again and reconnect the bracelet.
2. In the phone settings, find Special Permissions → Autostart and add the Mi Fitness/Zepp Life app to exceptions.
3. For Xiaomi phones: disable Battery Optimization for the bracelet application in Settings → Applications → Battery Management.

⚠️ Note: If your phone supports Bluetooth 5.0+, But the bracelet is connected to 4.2, which is normal. Xiaomi Redmi Band uses an older version of the protocol to save energy, but this does not affect the stability.

2.Mi Fitness or Zepp Life app crashes

Mi Fitness and Zepp Life (formerly Mi Fit) applications often cause communication loss due to:

• 📲 Outdated version (especially if you have disabled automatic updates in Google Play or App Store).
• 🗑️ cached data that conflicts with the new bracelet firmware.
• 🔄 Incompatibility with the version Android/iOS (For example, Zepp Life. 6.0+ Android requires 8.0 or newer).
• 🚫 Blocking background activity by system optimizers (for example, MIUI Optimizer on Xiaomi smartphones).

How to fix it:

Remove the Mi Fitness/Zepp Life cache in your phone settings

Update the application to the latest version

Restart your phone after the update

Disable VPN or proxy (they can block sync servers)

Check the permissions of the application (access to location, notifications, contacts)

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If the bracelet doesn’t connect after this, try reinstalling the app completely. Before you do that, export your training data to a file (Mi Fitness: Profile → Settings → Data Export).

⚠️ Warning: After reinstalling the app, the bracelet may require re-attachment to your account. Use the same Mi Account as before, or your training statistics will be lost.

3. Incompatibility of bracelet and phone firmware

Xiaomi Redmi bracelets with firmware below 1.2.4.8 often lose touch with Android 12+ phones due to changes in the Bluetooth protocol, a problem that is especially relevant for Redmi Band 1 (2020) models and early Redmi Band 2 batches.

How to check the firmware version:

1. Open the Mi Fitness/Zepp Life app.
2. Go to Profile → My Devices → [Bracelet Name] → Device Information.
3. Find the firmware version line.

If the version is older than 1.2.4.8, you must update the bracelet:

1. Connect the bracelet to charging and wait for a charge of at least 50%.
2. In the app, go to Profile → My Devices → [Bracelet] → Firmware Update.
3. Follow the instructions on the screen. Don't turn off the bracelet from charging during the upgrade!

Hardware problems: battery, contacts, physical damage

If the software didn't work, maybe the hardware of the bracelet or the phone is the problem.

• 🔋 Battery wear (if the bracelet discharges in a few hours, the Bluetooth module can be turned off to save energy).
• 🔌 Oxidation of contacts on the charging port of the bracelet (leads to unstable operation and spontaneous reboots).
• 📶 Interference from other devices (for example, if a microwave or Wi-Fi router is running nearby at 2.4 GHz frequency).
• 💥 Falls or impacts, after which the Bluetooth module could move away.

How to diagnose:

1. Check the charge: Connect the bracelet to charge for 1 hour. If the indicator does not burn or flashes red - a problem with the battery or contacts.
2. Inspect the case: Cracks, dents, or traces of moisture (even if the bracelet has IP68 protection, prolonged exposure to water can damage the board).
3. Test elsewhere: Try connecting the bracelet to your phone in another room - external interference may be to blame.

If you suspect a battery malfunction, try resetting the bracelet to factory settings:

On the bracelet: Settings → System → Data reset → Confirm


In the app: Profile → My devices → [Bracelet] → Untie the device

⚠️ Note: After reset, all data on the bracelet will be deleted, including training history.If you have a Redmi Smart Band Pro, pre-export data via Mi Fitness → Profile → Settings → Export of data.

5. Conflict with other applications or services

Sometimes the Xiaomi Redmi bracelet is disconnected from the phone due to the intervention of third-party programs.

• 🛡️ Antiviruses (e.g. Avast, Kaspersky) – can block a connection, considering it suspicious.
• 🔄 Battery optimizers (e.g. Greenify, AccuBattery) – forcefully shut down Mi Fitness background processes.
• 📡 VPN Proxies – can interfere with synchronization with Xiaomi servers.
• 🎧 Other Bluetooth devices (earphones, speakers) – if they are connected at the same time as the bracelet.

How do you decide?

1. Temporarily disable the antivirus and check if the connection is restored.
2. In the phone settings, add Mi Fitness to optimizer exceptions (Settings → Applications → Special Access → Battery Optimization).
3. Turn off the VPN and try to reconnect the bracelet.
4. If you use headphones, turn them off before connecting the bracelet.

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If you have a Xiaomi/Redmi/POCO phone, disable the dual Mi Fitness app feature, which can create a conflict between two copies of the program, resulting in loss of communication with the bracelet.

6.Mi Account issues

Less commonly, but accurately, the bracelet may lose communication due to problems with the Mi Account link, which occurs if:

• 🔄 You recently changed your password from your Xiaomi account.
• 🚫 Account blocked for suspicious activity (such as too frequent login attempts).

How to fix it:

1. Open the Mi Fitness app, go to Profile → Settings → Account and update the login details.
2. If the bracelet has already been linked to another account, untie it through Profile → My Devices → [Bracelet] → Untie it.
3. Try to log in to your Mi Account via your browser – if there is a lock, follow the recovery instructions.

If you don't connect after that, try creating a new Mi Account and tying it to your device, which is a last resort, because you'll have to reset the bracelet.

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If the bracelet connects to the phone, but the data is not synchronized (steps, pulse, sleep), the problem is precisely in the account or servers of Xiaomi.

7. When to contact the service center

If you have tried all the ways, but the Xiaomi Redmi bracelet still does not connect to the phone, you may need repair or replacement.

• 🔋 The bracelet is not switched on or charged (even after resetting).
• 📶 Bluetooth indicator does not burn when trying to connect.
• 💥 On the body visible traces of moisture or mechanical damage.
• 🔄 The bracelet is constantly reset or turned off spontaneously.

Before the service visit:

1. Take screenshots of errors (if they appear in the app).
2. Write down the bracelet serial number (located on the box or in Settings → About the device).
3. Check whether the warranty is valid (for Xiaomi Redmi, the standard period is 12 months).

Official Xiaomi service centers in Russia and CIS can be found on the website mi.com/ru/service. If the bracelet is purchased abroad, check whether it is covered by an international warranty.

FAQ: Frequent questions about communication issues