Why Xiaomi headphones do not mate with each other: a complete analysis of the problem

The problem with pairing Xiaomi wireless headphones is one of the most common complaints users have: You pull out of the case AirDots, Buds or FlipBuds, and instead of the usual beep, you get silence or a message "Device not found." Or worse: One earbud connects to the phone, and the other doesn't see the first. Is it familiar? We've analyzed hundreds of reviews on the Mi Community forums, 4PDA and service centers to collect all possible causes and working solutions.

In this article, you will not have template tips, but specific instructions based on the features of Xiaomi firmware from 2023-2026. You will learn how to distinguish hardware from software failure, why headphones stop syncing after updating. MIUI, And what if you don't reset to the factory settings — FAQ Responding to rare cases that are not covered even in official documentation.

1. The main reasons for the lack of pairing between headphones

Before we rush to refish the device or bring it to the service, we'll get to the root of the problem. 90 percent of the time, one of three things is to blame.

• 🔋 Battery discharge – even if the indicator in the case is green, individual headphones may be discharged unevenly.
• 📱 Firmware conflict - after update MIUI or firmware headphones their versions may become incompatible.
• 🔄 Synchronization failure – Headphones forget each other due to a software failure or physical communication break (for example, if one of them was turned on separately).

Less common hardware problems: damage to contacts in the case, failure of the Bluetooth module in one of the headphones or mechanical damage after a fall.

If your case doesn't fall into any of the categories in the table, check the firmware version of the headphones.

1. Connect the headphones to the Xiaomi phone.
2. Open the Mi Home app (or Xiaomi Wear for new models).
3. Go to the device section → Settings → About the programme.

2. Software failures: how to fix without service

Most pairing problems are solved without disassembling the device, so let's start with the simplest and gradually move on to complex manipulations.

Resetting headphone settings

This is the first step that is recommended even in official support of Xiaomi, the procedure differs depending on the model:

• 🎧 AirDots 1/2/3 Generations: Put both earphones in the case, close the lid. Press and hold the button on the case. 15 seconds until the indicator flashes red and white.
• 🎧 Buds 4/5 Pro, FlipBuds: remove the headphones from the case, press the touch panels on both headphones at the same time on the 10 Wait for the double beep.

After reset, the headphones should automatically buckle together and appear in the list of available Bluetooth devices. If this does not happen, move on to the next step.

Make sure your headphones are charged at least 30 times%|

Close all applications using Bluetooth|

Disable headphones from all previously connected devices|

Put the headphones in the case (for models with a case)-->

2.2. Update the firmware through Mi Home

Outdated firmware is a common cause of headphone conflicts, such as after an update. MIUI 14 Many AirDots 3 Pro users have experienced the headphones stop syncing.Solution:

1. Install the latest version of the Mi Home app (or Xiaomi Wear for new models).
2. Connect one headphone to your phone (usually the right one).
3. In the application, find your device and check for updates in the Settings section. → Firmware update.
4. If the update is available, follow the on-screen instructions. Don't interrupt! After the update, wait for the headphones to pair automatically (it can take up to 2 minutes).

For Buds 5 Pro and later, a firmware update may require a connection to Xiaomi Cloud. Make sure your Mi Account has data sync enabled.

2.3 Conflict with other Bluetooth devices

Sometimes the headphones refuse to mate because of overload of the Bluetooth channel.

• Connected several devices at the same time (smart watch, column, fitness bracelet).
• Double audio mode is enabled (on some Xiaomi models).
• Bluetooth functions are active LE Audio or LC3 (into MIUI 14+).

Decision:

1. Turn off all unnecessary Bluetooth devices in your phone settings.
2. Go to Settings. → Connections → Bluetooth → Additionally, and disable the option of Double Audio.
3. For MIUI 14+: turn off LE Audio in Developer Settings (how to enable – see below).

How to turn on the developer settings on Xiaomi:


1. Go to Settings → About the phone.




2. 7 times click on "Version MIUI".




3. Go back to Settings → Additional → For developers.

3. Hardware problems: when without service can not do

If all the software methods have been tried and the headphones still don't match, there's a possibility of physical malfunctions, and you can divide them into three categories:

1. Problems with the case - oxidation of contacts, damage to the charging board.
2. A Bluetooth module malfunction in one of the headphones.
3. Mechanical damage (cracks on the board, antenna break).

Let us consider each case in more detail.

Case diagnosis

The case is not just a storage case, but a charging and synchronizing module, and if the contacts inside the case are contaminated or deformed, the headphones may not charge evenly, leading to pairing failures.

How to check:

• 🔍 Examine contacts in the case and on headphones for oxidation (green coating) or contamination.
• 🔋 Check if both earbuds charge at the same rate.If one charges longer, contact issues.
• 🔄 Try putting the headphones in the case in reverse order (if the model supports.

To clean the contacts, use a cotton swab dipped in isopropyl alcohol. Do not use acetone or other aggressive solvents!

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If the headphones don’t sync after cleaning the contacts, try connecting them to another case (if possible), which will help determine exactly if the case is to blame.

Verification of the Bluetooth module

If one of the headphones connects to the phone and the other doesn't, the Bluetooth module is likely to fail.

1. Try connecting each headphone separately to the phone.
2. If one of them is not detected at all (even after reset), the module is faulty.
3. Check whether the "dead" headphone responds to the pressing of buttons (sound signal, flashing indicator).

In Xiaomi service centers, the cost of replacing a Bluetooth module for AirDots models older than 2 years often exceeds the price of new headphones.

Mechanical damage

Xiaomi headphones are not very hard to hit, even a slight drop can lead to:

• 🔌 Antenna break (earphone loses contact with case and second headphone).
• 🔧 Cracks on the board (lead to unstable work).
• 🎛️ Damage to microphone or speaker (indirectly affecting the pairing process).

Visually inspect the headphones for:

• Cracks on the body (especially in the hinge area for FlipBuds).
• Chops near the indicators or buttons.
• Curves of the shape (for example, if the earphone began to sit tighter in the ear).

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If the headphones fell from a height of more than 1 meter or were subjected to strong vibrations (for example, in a backpack without a cover), the probability of mechanical damage is ~70%.

4. Specific problems for different models

Some Xiaomi headphones have unique “diseases” that are worth knowing about.

4.1. Xiaomi AirDots (1/2/3 generation)

The most common problem is loss of communication after extraction from the case, most often due to:

• 🔋 Uneven charging – one earphone discharges faster than the second.
• 📵 Failure in the firmware of the case (relevant for the parties of 2020-2021).

Solution for AirDots 3:

1. Update the case firmware through Mi Home (case settings section).
2. If the update is not available, reset the case: press the button on the case 20 times in a row (with intervals). ~1 second).

4.2. Xiaomi Buds 4/5 Pro

These models suffer from conflict with function. LDAC (High-resolution codec. If the phone settings are enabled LDAC, headphones can:

• Delayed connection.
• Lose synchronization when playing music.
• Disconnect after 5-10 minutes of use.

How to turn off LDAC:

1. Go to Settings → Connections → Bluetooth.
2. Find your headphones in the list and click on the gear next to you.
3. Select the Audio Codec. → SBC or AAC.

4.3. Xiaomi FlipBuds Pro

This model often has a problem with the Hall sensor (responsible for determining the position of the earphone in the case), and if the sensor is contaminated or damaged, the headphones can:

• Do not turn on when extracting from the case.
• Disconnect spontaneously during use.
• Not synchronizing with each other.

Decision:

• Clean the sensor area (a small hole next to the contacts) with a dry soft brush.
• If the problem remains, contact the service - the Hall sensor requires soldering.

5. Alternative methods of pairing

If the standard methods didn’t work, try non-obvious techniques that sometimes help even in hopeless cases.

Compulsory pairing through the engineering menu

This method is suitable for advanced users and requires root rights or ADB. The idea is to manually initialize the pairing process through the Bluetooth engineering menu.

Instructions:

1. Connect your phone to your PC and enable USB Debugging.
2. Open the command line and type in: adb shell am start -n com.android.settings/.development.DevelopmentSettings
3. Enable the Enable Bluetooth option HCI sniffer logs.
4. Reboot your phone and try to re-connect the headphones.

This method helps in the ~30% of cases when headphones are determined by the phone, but do not mate with each other.

5.2 Use of the second telephone

Sometimes the headphones refuse to mate with the main device, but successfully connect to another phone.

1. Take a second phone (preferably on Android 10)+).
2. Reset the headphones to factory settings (see section 2.1).
3. Connect the headphones to the second phone and wait for automatic synchronization.
4. Turn off the headphones from the second phone and try to connect to the main one.

This method works because sometimes the Bluetooth cache on the main device is damaged, and the headphones need a “clean” pair for initial synchronization.

Manual assignment MAC-address

In rare cases, headphones lose their unique identifiers (MAC-Addresses that can't "recognize" each other can be fixed via the nRF Connect app (available for Android and iOS).

Instructions:

1. Install nRF Connect from Google Play.
2. Connect each headphone individually and write them down. MAC-Addresses (Device Information section).
3. Manually initialize pairing via the Connect command in the app.

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If you are not sure about your skills with ADB Or nRF Connect, you better go to the service. The wrong commands can permanently disable the headphones.

6.When to contact the service: checklist before the visit

If you've tried all the techniques in this article and the headphones still don't match, it's time to get ready for a visit to the service center.

The headphones have no visible mechanical damage.|

All software methods (reset, update, change phone) tried|

The problem is reproduced on several devices|

Headphones are guaranteed (check check or purchase date in Mi Account)-->

In Xiaomi service centers, the diagnosis of headphones takes 1-3 days, and the cost of repair depends on the problem:

Please note that if the headphones were purchased outside of official stores (for example, on AliExpress or Wildberries from unverified sellers), the warranty may not apply.

1. Open Mi Home → Choose your headphones.
2. Go to Settings. → About the programme.
3. Compare the serial number to what is on the box.

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If the serial numbers don't match, your headphones could be fake, in which case the official service will refuse repairs.

FAQ: Answers to rare questions