How to sync Xiaomi headphones with each other: the complete guide 2026

Xiaomi wireless headphones are some of the most popular TWS-The headsets are on the market due to the combination of price, sound quality and functionality, but even proven models like the Redmi AirDots 3 Pro, Mi TrueWireless 2 or Buds 4 sometimes have a typical problem: one earphone does not sync with the second. Instead of stereo, you hear music only on the right or left device, and the second one is silent or emits intermittent signals.

The causes of this malfunction can range from a simple battery drain to a firmware failure. In this article, we will discuss all the ways to synchronize Xiaomi headphones, including forced reset, software updates and manual reconnection. You will also learn how to avoid repeated problems and what to do if standard methods do not help.

Why Xiaomi headphones are outsynchronized: the main reasons

Before you start setting up, it's important to understand what caused the failure, and 80 percent of the time, it's a simple solution, but sometimes it requires a deep diagnosis, and here are the most common reasons for the out-of-synchronization:

• 🔋 A discharged battery in one of the headphones (even if the indicator is green, the real charge can be critically low).
• 📱 Bluetooth connection failure on a smartphone or other source device (especially relevant for Android 12)+ iOS 15+).
• 🔄 Automatic connection to another device (earphones "memorized" the old gadget and try to connect with it).
• 🛠️ Software failure in the firmware of headphones (often occurs after an interrupted update or prolonged inactivity).
• 🎧 Mechanical damage to contacts in the case or the headphones themselves (for example, after falling or getting moisture).

Interestingly, some Xiaomi models (like the Redmi Buds 4 Active) automatically reset sync if not used for more than 72 hours, which is done to save energy, but often leads to confusion among users, and the problem can occur after a smartphone firmware update - new versions of the OS sometimes conflict with older Bluetooth drivers.

Preparing for synchronization: what to do in advance

Before you try to connect your headphones, follow a few mandatory steps that will save time and increase your chances of success:

1. Charge your headphones and your case. Connect your case to the grid for 15 to 20 minutes, even if the light shows a charge. Sometimes the power controller gives the wrong reading.
2. Clean contacts. Wipe the metal contacts in the case and on the headphones with a dry cotton swab - oxidation or dirt can block charging and synchronization.
3. Check Bluetooth on your smartphone. Make sure Bluetooth is on and there are no duplicate recordings of your headphones in the list of associated devices.
4. Rebooting the source device. Sometimes it helps to turn off/on your phone or laptop.

If you use headphones with custom firmware (for example, reflashed AirDots 3 Pro for custom functions), return the original version of the software. Unofficial modifications often disrupt the work. TWS-protocol.

Make sure the case is charged (the indicator is white/green)

Wipe the contacts of headphones and case with an alcohol napkin

Remove headphones from the list of Bluetooth devices on your smartphone

Reboot your smartphone or PC

Try connecting the headphones to another device (for diagnosis)-->

Method 1: Standard case synchronization (for most models)

This method works for Redmi AirDots, Mi TrueWireless 2/3, Buds 4 and other automatic pairing models.

1. Put both headphones in the case and close the lid for 10 seconds.
2. Open the lid - the indicator on the case should flash white (search mode).
3. On your smartphone, turn on Bluetooth and find your headphones in the list of devices (the name usually contains Mi or Redmi).
4. Press "Connect." If requested. PIN-Enter 0000 or 1234.

If the light flashes red, it means that the headphones are discharged or there is a synchronization error, in which case move on to the next method.

Method 2: Forced resetting of headphones (Hard Reset)

If standard synchronization doesn't work, do a hard reset, which removes all the saved settings and returns the headphones to factory status, and you'll notice that when you reset, the headphones will lose all the paired devices, and you'll have to reconnect them to all the gadgets.

Instructions for most Xiaomi models:

1. Put both headphones in the case and close the lid.
2. Press and hold the button on the case (usually located behind or below) for 20-30 seconds.
3. The indicator on the case will start flashing red and white alternately - this is a signal of a successful reset.
4. Open the lid and wait until the indicator starts flashing white (pairing mode).
5. Connect your headphones to your smartphone as a new device.

For models without a physical button (e.g. Xiaomi Buds 4 Pro), the reset is done via touch control:

1. Get the headphones out of the case.
2. Touch and hold the touchpads on both headphones simultaneously for 15 seconds.
3. Wait for the beep and the lights to flash.

💡

If the headphones don’t sync after reset, try connecting them to another device (like a tablet or PC) to help determine if the problem is in the headphones or in your smartphone.

Method 3: Manual pairing via engineering menu (for advanced users)

If previous methods have failed, you can try forced synchronization via service commands, which is suitable for models based on Qualcomm QCC3040 or BES2300 chips (for example, Redmi AirDots 3 Pro, Mi TrueWireless 2).

You'll need:

• 📱 Android smartphone (for iPhone the method does not work).
• 🔌 The nRF Connect app (available on Google Play).
• 🎧 Headphones with a charge of at least 50%.

Step-by-step:

1. Install and open the nRF Connect application.
2. Turn on Bluetooth on your smartphone and find your headphones in the list of devices (they can be displayed as Unknown Device).
3. Connect to the headphones through the app.
4. Go to the UART tab and send the command: AT+RESET This will reset the Bluetooth module settings.
5. Then send a command to force synchronization: AT+TWS=1
6. Reset the headphones (put in the case and get back).

If the headphones still don’t work together after these actions, the problem may be in the hardware (the Bluetooth module or antenna is damaged).

💡

Use engineering commands only if you're confident in your actions. Wrong commands can permanently disable your headphones.

Table: Xiaomi models and features of their synchronization

Frequent Mistakes and How to Avoid Them

Many users make the same mistakes when trying to sync Xiaomi headphones. Here's what you can't do and why:

⚠️ Warning: Never press the reset button on the case if the headphones are out of range of the Bluetooth smartphone.This can cause the firmware to "hang" and the headphones will stop turning on altogether.

• 🚫 Use non-original chargers: Cheap cables or power supplies can damage the charging controller in the case, leading to constant synchronization failures.
• 🚫 Interrupt the firmware update process. If you start updating your headphones through the Xiaomi Earbuds app, don't close it or turn off Bluetooth until the process is complete.
• 🚫 Keep your headphones wet, condensate or sweat can oxidize your contacts, which can lead to unstable work.
• 🚫 Connecting headphones to multiple devices at the same time: Multithreaded mode (for example, to a phone and a laptop) often causes protocol conflicts.

Also, avoid extreme temperature changes, for example, if you bring your headphones from the cold into a warm room, let them heat up to room temperature before use, otherwise you may microshorten the contacts.

⚠️ Warning: If one of the headphones still doesn't work after all the manipulations, check it on another device. If the problem persists, this may indicate a hardware malfunction (for example, an antenna dump or a Bluetooth module damage). In this case, contact the service center - self-repair without experience is fraught with final breakdown.

FAQ: Answers to Frequent Questions