What to do if the headphones Xiaomi AirDots are not synchronized with each other

You took out a Xiaomi AirDots case, and one headphone is silent or connected separately? The problem with the left-right synchronization is one of the most common problems with this model. Most often, it is a firmware failure, battery drain or conflicts with other Bluetooth devices. But the good news is that in 90% of cases, the problem can be solved on its own without contacting the service.

In this article, we will look at all possible causes, from simple discharge to hardware malfunctions, and give step-by-step instructions with photos and videos. We will focus on AirDots Basic, AirDots Pro, AirDots 2 and AirDots 3, because they have different reset algorithms, and you will learn how to prevent such failures in the future and what to do if no method worked.

Before you go into repair, check the obvious: both earphones are charged (are the indicators on the case white?), the distance to the phone is less than 10 meters, and there are no other connected devices in the Bluetooth settings. If everything is in order, then we proceed to the diagnosis.

1. Reasons for non-synchronization of headphones Xiaomi AirDots

The synchronization problem is caused by a communication disorder between the lead (usually right) and the led (left) headphones, and here are the main reasons:

• 🔋 The discharged battery of one of the headphones (even if the case shows a charge, the module itself can be discharged).
• 📱 Bluetooth conflict with other devices (for example, if the headphones were previously paired with another phone).
• 🔄 Firmware failure after update or abrupt shutdown.
• 🎧 Mechanical damage to contacts in the case or the headphones themselves.
• 📡 Interference from other wireless devices (Wi-Fi routers, microwaves, other headphones).

According to service center statistics, 60 percent of out-of-synchronizations are caused by software failures, 30 percent by battery failures, and only 10 percent by hardware failures, which means that in most cases, the problem can be solved without repair.

If the headphones have never synced since the purchase, most likely a marriage or a fake, if the problem comes suddenly, it's a software failure or a mechanical damage, and then we'll look at the solutions for each case.

Fast Solution: Reset and Reconnect

The first and most effective method is hardware reset, which works for all Xiaomi AirDots models, but the algorithm is different:

For AirDots 3 and AirDots Pro, the process is a bit different:

1. Put the headphones in the case and close the lid.
2. Press and hold the button on the back of the case for 30 seconds (the indicator should flash red 3 times).
3. Open the lid, pull out the headphones - they should automatically sync.

If after resetting the headphones still do not sync:

• 📱 Remove them from the list of paired devices in Bluetooth settings.
• 🔄 Reboot your smartphone (sometimes cleaning up your Bluetooth cache helps).
• 🔋 Check the case charge – if it is below 20%, synchronization may not work.

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Once reset, the headphones can connect as two separate devices, in which case, first connect the right (master), then the left - they sync automatically.

3. Charge and contact problems

If one of the headphones doesn't charge or discharges too quickly, it can cause synchronization problems.

For diagnosis:

1. Put your headphones in the case and look at the indicators: 🔴 Red -- charging's coming. 🟢 Green is full charge. 🔴🔴 Flashing red - charging error.

If one headphone does not burn, the problem is in the contacts or battery.

⚠️ Note: Do not use abrasive materials (steel, metal brushes) to clean contacts - this will damage the coating and worsen contact.

If the headphone is not holding a charge (discharges in 30-60 minutes), the battery is likely to be worn out, in which case only replacement will help. For AirDots 2/3, you can find batteries on AliExpress (article C103450 for the right and C103451 for the left).

4. Update to the headphone firmware

Synchronization failures often occur after an automatic firmware update, especially if the process has been interrupted, to manually update the software:

1. Install the official Mi Home or Xiaomi Wear app (for newer models).
2. Connect the headphones to the phone via Bluetooth.
3. Open the app, find the headphones in the list of devices and check for updates in the Firmwer section.

For Xiaomi/Redmi/POCO phones, additionally:

1. Go to Settings → Connections and Sharing → Bluetooth.
2. Click on the three dots in the top right corner and select Developer Mode.
3. Turn on the AVRCP 1.6 option (improving compatibility with headphones).

If the headphones are connected, but the sound is only in one:

• 🎵 Check the sound balance in the settings (sometimes 100% left/right).
• 🔊 Turn on / off the Mono mode sound in the special features settings.
• 📱 Reconnect the headphones (sometimes it helps to change the master module).

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Samsung phones sometimes require you to disable the dual audio feature in Bluetooth settings, as it conflicts with AirDots.

Hardware malfunctions and repairs

If none of these methods worked, the problem could be the hardware.

For self-repair will need:

• 🔧 Setting screwdrivers T3-T5 (case-breaker).
• 🔥 A soldering iron with a thin sting (for battery replacement or contacts).
• 🔍 Loupe or microscope (contacts are very small).
• 📦 Spare parts (batteries, plumes - look for AliExpress on the model of headphones).

⚠️ Warning: Disassembling AirDots headphones requires microelectronics experience. Mistakes in soldering can lead to complete loss of performance.

Cost of repair in the service:

• 🔋 Battery replacement: 800–1500 ₽ (model-wise).
• 📡 Replacement of Bluetooth module: 1500-2500 ₽.
• 🔄 Full flashing: 500–1000 ₽.

If headphones are guaranteed - do not disassemble them yourself! Contact the official Xiaomi service (list on the website). mi.com/ru/service). For AirDots. 3 guarantee 12 months, for older models — 6 months.

7. How to prevent future problems

To avoid repeated synchronization failures, follow these guidelines:

• 🔋 Charging: Do not allow full discharge of headphones (charge at 20-30% charge).
• 📱 Connection: Always turn off your headphones via Bluetooth menus, not just take them out of your ears.
• 🔄 Updates: Install firmware only through the official Mi Home app.
• 🧼 Clean contacts once a month with alcohol (do not use wet wipes!).
• 🌡️ Temperature: Do not leave your headphones in the sun or in the cold (optimum: 0-35)°C).

For AirDots 3 and AirDots Pro, additionally:

• 🎵 Turn it off. LDAC in sound settings (this codec may cause delays).
• 🔇 Do not use headphones at maximum volume for more than 30 minutes – this reduces the life of the speakers.

If you often experience sync problems, try alternative firmware (like AirDots Pop Mod for AirDots 2) that optimizes Bluetooth and increases battery life, but note that this voids the warranty.

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Keep your headphones in your case even when you’re not using them – this protects them from dust and mechanical damage, and prevents accidental switching on.

FAQ: Frequent questions about synchronization Xiaomi AirDots