Redmi Airdots is out of sync: 7 working ways to fix the problem

Xiaomi Redmi Airdots wireless headphones have gained popularity due to their affordable price and good sound, but many users face a common problem - desynchronization of the left and right earphones. One of them can turn off, not connect to the phone or play back the sound with a delay while the second one is working normally, most often after a firmware update, prolonged downtime or mechanical damage.

In this article, we will analyze all possible causes of desynchronization and propose 7 You'll learn how to restore sync, including resetting, manual flashing, and hardware techniques, and how to prevent the problem from recurring and what to do if none of these things work. Instructions are suitable for all Redmi Airdots models (including Airdots) 2/3/Pro), but with their own characteristics in mind.

Why Redmi Airdots headphones are out of sync: 5 main reasons

Before you start repairing, it's important to understand what caused the failure, and 80 percent of the time, the problem is software-based and fixes itself without going to a service center, and here are the key reasons:

• 🔋 Battery discharge up to 0% – if one of the headphones is completely discharged, it can “forget” pair settings.
• 📱 Conflict with the firmware of the smartphone – especially after the update MIUI Android.
• 🔄 Automatic connection failure – Headphones try to connect to different devices at the same time.
• 🛠️ Mechanical damage – falls, moisture or overheating can disrupt the Bluetooth chip.
• 🖥️ Outdated firmware headphones – in early versions of the software were bugs with synchronization.

The most insidious reason is a hardware failure of the Bluetooth controller in one of the headphones, in which case the software methods will not help, and a replacement of the board will be required, but such cases are rare and usually accompanied by other symptoms: the earphone does not charge, does not turn on or makes extraneous noises.

Method 1: Hard Reset (Hard Reset)

This is the first and most effective method, which works 60 percent of the time, and resets the headphones back to the factory settings, and forcibly restarts the synchronization process, and it's important that you reset Redmi Airdots to the phone.

Instructions for all Airdots models (except Airdots Pro 2):

1. Put both headphones in the charging case and close the lid.
2. Wait until the headphones go out (this means they are completely turned off).
3. Press and hold the button on the case (usually side or back) for 15-20 seconds.
4. The indicators on the headphones should flash red and white - this is a signal of a successful reset.
5. Get the headphones out of the case – they should automatically synchronize (the indicators will flash alternately).

For Redmi Airdots Pro 2, the process is a bit different:

1. Get the headphones out of the case.


2. Press the touch panels on both headphones for 10 seconds.




3. Wait for the double blinking of the white light.




4. Place the headphones back in the case for 5 seconds, then pull out.

⚠️ Warning: If the headphones didn't sync for 2 minutes after reset, repeat the procedure. If the problem persists, move to the next method.

Method 2: Manual reconnection via Bluetooth settings

Sometimes the failure occurs due to a conflict of Bluetooth profiles in the smartphone, in which case the "clean" connection helps:

1. Open the Settings. → Bluetooth on your phone.
2. Find Redmi Airdots (or Mi True Wireless) and click on the icon ⚙️ near.
3. Select Forget the device (or Remove it).
4. Return the headphones to the case, then pull out - they should go to search mode (blinking white light).
5. Turn on Bluetooth on your phone and find Redmi Airdots on the list of available devices. Connect.

If the headphones don’t appear on the list, try:

• 🔄 Reboot your smartphone.
• 📱 Disable Bluetooth on other devices (laptop, tablet) that Airdots previously connected to.
• 🔋 Check the charge of the case - at a level below 10%, the headphones may not turn on.

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If the headphones are connected separately but not together, try connecting the right (main) and then the left first, which solves the problem in some firmware.

Method 3: Update the firmware headphones

Outdated software is a common cause of desynchronization, especially in Redmi Airdots 2 and Airdots 3. Xiaomi regularly releases updates that fix plug-in bugs. You can check and update the firmware through the official Mi Home app (only for some regions) or manually.

Update via Mi Home:

1. Install the Mi Home app from Google Play or the App Store.
2. Sign up or sign in to your Xiaomi account.
3. Connect the headphones to the phone via Bluetooth.
4. In the application, go to Profile → Settings → Update the firmware.
5. If an update is available, follow the instructions on the screen.

Handheld firmware (for advanced users):

If automatic updates are not available, you can flash your headphones over your PC using the utility nRF Connect or Flippy, a method that is risky – if you make a mistake, the headphones can turn into a “brick”.

⚠️ Warning: Firmware from another model (e.g., installing software from Airdots 3 on Airdots 2) will cause the headphones to fail. Always check compatibility!

Method 4: Checking and Replacing the Battery

If the headphones only become out of sync when the charge is low (for example, below 20%), the problem may be in the worn-out battery. Over time, the battery capacity drops, and one of the headphones shuts down due to lack of power to maintain communication.

How to check:

• 🔋 Look at the charge indicators in the case – if one earphone discharges much faster than another, this is a sign of wear and tear.
• 📊 Use apps like AccuBattery (for Android) to monitor discharge.
• ⚖️ Compare the time of operation: if the difference is greater than 30%, the battery needs to be replaced.

What to do:

You can replace the battery in Redmi Airdots yourself, but it requires care.

• 🔧 Plastic mediator or thin screwdriver.
• 🔥 Hazel-softening.
• 🔋 New battery (e.g., new battery, 3.7V 43mAh for Airdots 2).

You can find step-by-step disassembly instructions on YouTube (see the headphone model). The average cost of replacing a battery in the service is 500-1000. ₽.

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If the headphones only become out of sync when the charge is low, try to fully discharge and charge them 3 times in a row (calibration), which restores normal operation in 40% of cases.

Method 5: Diagnostics of hardware malfunctions

If none of the software methods worked, the problem could be the physical damage to one of the headphones.

1. Microphone check: Call with your headphones connected. If the person can't hear you or the sound is intermittent, the microphone is faulty (often associated with the contacts on the board).
2. Speaker test: Play music at maximum volume. Wheezing, distortion or no sound in one earpiece indicates damage to the speaker.
3. Button check: Press the touchpads on both headphones. If one doesn't respond, the contact or control board is a problem.
4. Visual inspection: Light a flashlight into the charging socket. Oxidation, rust, or contamination can disrupt contact with the case.

Typical hardware faults and their signs:

If you are not sure about your skills, you should contact the service.The average cost of repairing the board at Redmi Airdots is 1500-2500 ₽, This is often compared to the price of new headphones.

Method 6: Alternative methods (if nothing worked)

In rare cases, standard methods don't work.

• 🔄 Connect to another device: Try syncing your headphones to another smartphone or PC. If they work normally, there is a problem with your phone (e.g., a Bluetooth stack failure).
• 📡 Bluetooth Transmitter Use: If the headphones are only out of sync with the phone, connect them via an external Bluetooth adapter (e.g., Xiaomi Bluetooth Audio Receiver).
• ⚡ Flashing through Engineering Mode: For power users, activate the engineering menu using code ##36446337## (not working on all models!).
• 🔧 Replacement of the headphone: In a pair of Redmi Airdots, the right earpiece is usually the "leader." If it breaks, you can reassign the role through firmware (requires a soldering iron and knowledge of electronics).

If the headphones are warranty, do not try to disassemble them yourself - this will void the warranty.

Preventing out-of-synchronization: 5 rules for caring for Redmi Airdots

To avoid repeated problems, follow these guidelines:

• 🔋 Charge the case regularly: Do not allow full discharge of headphones. It is optimal to keep the charge of the case at the level of 30-80%.
• 🧼 Clean contacts: Once a month wipe the charging contacts of headphones and case with a cotton swab soaked in isopropyl alcohol.
• 🌡️ Avoid overheating: Do not leave headphones in direct sunlight or near heat sources (e.g. on a car torpedo).
• 📵 Turn off Bluetooth when not in use: This reduces the load on the communication module and extends the service life.
• 📦 Keep in case: Do not wear headphones without a case - this protects them from dust, moisture and mechanical damage.

Also avoid using headphones while charging - this can lead to overheating and malfunctions in the Bluetooth module.

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The most common reason for out-of-synchronization is a faulty case. If the indicators on the case flash unstable or it doesn't charge the headphones, replace it. The original case for Redmi Airdots 2 costs about 800. ₽.

Frequent questions about Redmi Airdots desynchronization