How to sync Xiaomi headphones with each other: full instruction for all models

Xiaomi’s wireless headphones are among the most popular on the market, thanks to a combination of price, sound quality and functionality. 3T Pro or Mi True Wireless Earphones 2 sometimes have problems syncing with each other. One earphone may not connect to another, make intermittent sound or even refuse to work in pairs. If you are faced with this situation, do not rush to carry the device to the service center.

In 90% of cases, the problem is solved software: just reset, properly initialize the connection or update the firmware. In this article, we will discuss all possible ways to synchronize Xiaomi headphones with each other, including hidden features that are not written in the official instructions, you will learn how to return stereo sound if the headphones are defined as two separate devices, what to do when the connection is broken and how to prevent similar failures in the future.

Why are Xiaomi headphones not synchronized with each other?

Before we get to the bottom of a problem, it's important to understand why. Xiaomi headphones (as any other type of headphone) TWS-devices are synchronized with each other via Bluetooth Low Energy protocol (BLE), The main earpiece (usually the right earpiece) is responsible for the distribution of the sound channels, and if the communication between them is broken, it may be due to the fact that the headphone is not connected:

• 🔋 Discharged battery – if one of the headphones sat down, it automatically disconnects from the pair.
• 📱 Firmware failure – especially after an update or incorrect shutdown.
• 🔄 Conflict with other Bluetooth devices – for example, if the headphones were previously paired with another phone.
• 🎧 Mechanical damage - ingress of moisture, falls or wear of contacts in the case.
• 🛠️ Resetting settings on the phone - after resetting Android/iOS Headphones can "forget" each other.

The most common cause is a software failure of the headphone, which stops transmitting the signal to the second device, causing sound to only go in one ear or disappears altogether, in which case forced reboot or factory reset helps, and less often the problem lies in the hardware, for example, the oxidation of contacts in the charging case prevents the correct initialization of the headphones.

Preparing for synchronization: what to check before setting up

Before you start complex manipulations, make sure that the problem is not the basics. Here is a checklist for the initial diagnosis:

Make sure both earphones are charged (indicators are green or white)

Check that the case is also charged (some models have a separate indicator)

Disconnect Headphones from All Devices in Bluetooth Settings

Reboot your smartphone or tablet to which you connect your headphones

Make sure the headphones are no more than 1 meter apart.-->

If you still don't sync after this, move to deeper settings. Note that on some models (e.g. Redmi Buds 4 Active), the headphone is automatically detected when you first connect, and if you manually change the headphone through the Mi Home or Xiaomi Wear app, it could cause conflict.

⚠️ Note: Some models (e.g. Xiaomi Buds) 3T Pro) require a firmware update through a proprietary application. Without this, synchronization may not work properly, even if the headphones are new.

Method 1: Forced synchronization through the case

The most versatile method that works on 99% of Xiaomi models is to reset the connection through a charging case.

1. Put both headphones in the case and close the lid.
2. Wait 10-15 seconds until the lights go out (this means that the headphones are completely switched off).
3. Open the case cover and hold the reset button (if any) for 10-15 seconds. On models without a physical button (such as the Redmi Buds 4 Pro), press and hold the touchpad on both headphones at the same time.
4. The indicators will start flashing red and white – this is a signal to reset the settings.
5. Close the case, wait 5 seconds and open again. The headphones should automatically sync (the indicators will flash synchronously).

If your model does not have a reset button, use an alternative method:

1. Get both earphones out of the case.


2.Push and hold the touch panels on both headphones for 20 seconds.




3. wait for the double flashing of indicators (reset signal).




4. Put the headphones back in the case for 10 seconds, then pull out.

After that, try connecting to the headphones via Bluetooth on your smartphone. They should be defined as a single device (for example, Redmi Buds). 4 Pro, not Redmi Buds. 4 Pro_L and Redmi Buds. 4 Pro_R separately).

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If the headphones flash differently (e.g. one red, one white), it means that the synchronization has not gone. Repeat the reset procedure again, holding the buttons for 5-10 seconds longer.

Method 2: Synchronization through the Mi application Home/Xiaomi Wear

For models that support proprietary software (for example, Xiaomi Buds 3 Pro, Redmi Buds 4 Pro), synchronization can be run through official applications:

• 📱 Mi Home – for old models (until 2021).
• 🎧 Xiaomi Wear (formerly Mi Earphones) – for new headphones (2022–2026.).

Instructions for Xiaomi Wear:

1. Install the app from Google Play or the App Store.
2. Connect the headphones to your phone via Bluetooth (they should be defined as one device).
3. Open Xiaomi Wear, select your headphone model.
4. Go to Settings → Reset (or Restore Factory Settings).
5. Confirm the reset and wait for the headphones to reset.
6. After restarting, the application will automatically start the synchronization procedure.

If the application does not have a reset button, try updating the firmware:

1. Open Xiaomi Wear → your headphone model.


2. Go to "Firmware Update."




3. If a new version is available, install it.




4.After the update, the headphones will reboot and sync automatically.

⚠️ Note: Some firmware Xiaomi Wear may show the error "failed to connect to the device." In this case, remove the headphones from the list of Bluetooth devices on the phone, restart the smartphone and reconnect.

Method 3: Manual synchronization via Bluetooth (for power users)

If standard methods don’t work, you can try to force the pairing of the headphones to each other via Bluetooth settings.This method is suitable for models that are defined as two separate devices (for example, Mi True Wireless Earphones). 2_L Mi True Wireless Earphones 2_R).

The algorithm of actions for Android:

1. Open the Settings. → Bluetooth on your phone.
2. Remove both headphones from the list of paired devices (click on the gear next to the name and select "Forget the device").
3. Take the headphones out of the case and wait until they start flashing white (search mode).
4. On the phone, click "Device Search" and wait until both headphones appear.
5. First, connect to the right earpiece (usually the main earpiece), and once successfully connected, the left earpiece should automatically sync.
6. If the left earphone is not connected, click on it in the list and confirm the pairing.

For iPhone (iOS) the process is similar, but with nuances:

• 🍎 B Settings → Bluetooth remove both headphones.
• 🔄 Reboot your iPhone (sometimes it helps to reset your Bluetooth cache).
• 🎧 Connect first to the right earpiece, then to the left earpiece.
• 🔋 If the sound is only in one ear, put the headphones in the case for 10 seconds, then pull out and reconnect.

Critical nuance: on the iPhone, you sometimes need to disable the function "Automatic switching between devices" (in Bluetooth settings next to the headphone name), otherwise the system may conflict with synchronization.

Method 4: Hardware reset (if nothing helps)

If the software methods didn’t work, the problem could be a hardware failure, in which case a complete reset via a service menu or a physical power outage will help, which is suitable for models with a collapsible case (for example, the Redmi AirDots of the first generation).

Instructions for hardware discharge:

1. Take the headphones out of the case and completely discharge them (wait until they turn off).
2. Put the headphones back in the case and connect the case to the charger.
3. As soon as the indicators on the case light up, immediately disconnect it from charging.
4. Remove the headphones and hold the touchpads on both for 30 seconds (until triple blinking).
5. Repeat the procedure 2-3 times, and it will reset the internal settings of the Bluetooth controller.

For models with non-removable battery (for example, Xiaomi Buds) 3T Pro) the hardware reset is performed through a service menu which opens with a special combination of touches:

1. Get the headphones out of the case.


2. Touch the right earphone touch panel 5 times in a row.




3. Touch the left earphone touch panel 3 times.




4. wait for the sound signal (voice message "Reset" or double squeak).




5. Put the headphones in the case for 10 seconds, then pull out.

⚠️ Warning: Hardware reset erases all custom settings, including gesture customization and equalizer. After the procedure, you may need to re-update the firmware through Xiaomi Wear.

Table: Xiaomi models and their synchronization features

If your model is not in the table, use the universal case-reset method (Method 1). Headphones older than 2020 (e.g., Redmi AirDots first generation) may require manual firmware via PC – read about this in the next section.

Method 5: Firmware headphones through PC (advanced level)

If all previous methods have failed and the headphones are still out of sync, the last option is to reflash the Bluetooth controller, which is suitable for advanced users and requires a Windows computer.

Important: The firmware erases all data and may result in a loss of warranty. Use this method only if:

• 🔧 Headphones are not defined by any device.
• 🔄 After they're dumped, they're separated again.
• 🎧 The sound is only in one ear, and the second earphone flashes red.

Firmware instructions:

1. Download the official firmware for your model from the Xiaomi Firmware website or forum 4PDA.
2. Install drivers for Qualcomm QCC30xx/QCC5xxx (depending on your headphone chipset).
3. Connect your headphones to your PC via Bluetooth (they should be determined as to how to use them). QCC3046 or similar).
4. Run a firmware utility (e.g. QFlash Tool or Nordic nRF Connect).
5. Select a firmware file (.hex or.bin) and start the process.
6. After the firmware is complete, put the headphones in the case for 30 seconds, then pull out and try to sync.

For chip-on-chip models BES2300 (For example, Redmi Buds 3 Lite, use the utility BES Detailed guides on firmware specific models can be found on thematic forums (for example, the section "Michai Headphones" on the site of the site). 4PDA).

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PC firmware is the last resort, and 95 percent of the time, it's a case or application reset, and if you're not sure about your skills, you should go to a service center.

Frequent Mistakes and How to Avoid Them

Even after successful synchronization, Xiaomi headphones can be disconnected again. To prevent this from happening, avoid these mistakes:

• 🔋 Do not allow a full discharge – if one headphone sits at zero, it can “forget” the settings of the pair.
• 📱 Don’t connect your headphones to multiple devices at the same time – it causes Bluetooth conflicts.
• 🔄 Do not interrupt the firmware update – this can lead to a software failure.
• 💦 Do not expose the headphones to moisture or overheating - this damages the contacts in the case.
• 🎧 Do not put headphones in the case wet - this leads to oxidation and poor contact.

If headphones often lose touch during use:

• 📶 Check if there are any sources of interference (microwaves, Wi-Fi routers at 2.4 GHz).
• 🔋 Make sure the case is charged – some models only sync when the case charge is above 20%.
• 🎵 Turn off the Absolute Volume function (3D-sound) in headphone settings - it can cause delays.

Frequently Asked Questions (FAQ)