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

Xiaomi Redmi Airdots wireless headphones (including Redmi Airdots models) 2/3/Pro) They became one of the most popular TWS-But many users face a common problem: one earbud connects to the phone, and the other is silent or separate, because the headphones are not synchronized, because they stop seeing each other as a pair.

Most of the time, the problem is solved by simply resetting and re-binding, but there are nuances. For example, in Redmi Airdots 3 Pro models, the synchronization algorithm is different from the basic version, and in Redmi Buds 4, Bluetooth 5.2 support is added, which requires an updated approach. In this article, we will discuss all the synchronization methods, from standard to “hidden” methods, which are not written in the official instructions.

Why are Redmi Airdots headphones out of sync?

The reasons for loss of communication between headphones are divided into two categories: hardware (physical damage, battery discharge) and software (firmware failures, Bluetooth conflicts).

• 🔋 Different charge levels. If one earphone is dead and the other is not, they may not sync automatically after recharging.
• 📱 Conflict with another device: Headphones may have previously connected to another smartphone/tablet and "forget" pair mode.
• 🔄 If you don't pull the headphones out at the same time, one of them might activate later and not synchronize.
• 🛠️ Firmware failure. Especially relevant for Redmi Airdots 2 with early versions of software (up to 1.4.0.6).
• 🎧 Mechanical damage: Moisture or impacts can damage the synchronization contacts inside the case.

According to service centers, 60% of calls for a “defaulting earphone” are solved by a simple reset, the remaining 40% are divided equally between hardware malfunctions and user errors (for example, trying to connect the left earphone separately as a mono device).

⚠️ Note: If the headphones have never worked together (for example, after purchase), there is a factory malfunction. In this case, the reset will not help - contact the store for replacement under warranty.

Preparing for synchronization: what to do before resetting

Before resetting, follow the mandatory steps, which will save time and eliminate common errors:

1. Charge the case and headphones. Make sure the indicator on the case is white or green (charge level above 30%). Red or flashing orange means low charge - synchronization may not pass.
2. Remove the headphones from the list of Bluetooth devices on all the gadgets they connected to. path: Settings → Bluetooth → Find Redmi Airdots → Forget the device.
3. Check your physical condition. Clean your headphones and case contacts with a cotton swab dipped in alcohol. Dust and oxidation can block charging and synchronization.

If you have a Redmi Airdots 3 Pro or newer, check the firmware version through the Mi Home app (Devices → Headphones → Software Update).Oddated firmware can cause problems with Bluetooth LE Audio.

Charge the case to 100% | Remove the headphones from Bluetooth on all devices | Clear the contacts of the headphones and case | Check the firmware version (for Airdots 3/Pro)

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Standard Synchronization Method (for all Redmi Airdots models)

This method works for Redmi Airdots (1st generation), Redmi Airdots 2, Redmi Airdots 3 and their modifications. The instruction is universal, but there are nuances for pro-versions (see next section).

1. Put both earbuds in the case and close the lid for 10 seconds, which will bring them back to their original state.
2. Open the case cover and wait until the headphone indicators start flashing white (search mode).
3. Press the button on the case (side or bottom) for 15-20 seconds until the indicator flashes red and white alternately.
4. Close the case for 5 seconds, then open again. The headphones should automatically sync (the indicators will light up with a constant white).
5. Connect to your phone. In the Bluetooth list, the Redmi Airdots (or Mi True Wireless for older models) device will appear.

If the headphones still don’t sync after these steps, try an alternative method (see section below).For Redmi Airdots 3 Pro and Redmi Buds 4 models, the standard reset may not work – a special procedure is required.

Redmi Airdots (1st generation)|Redmi Airdots 2|Redmi Airdots 3|Redmi Airdots 3 Pro|Redmi Buds 4|Other model

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Alternative synchronization method (if standard did not help)

If the headphones don't work together after reset, try forced synchronization through manual button control, which is suitable for all models, but is especially effective for Redmi Airdots 2 and Redmi Airdots 3.

Instructions:

1. Get both earphones out of the case.
2. Press and hold the touchpad on the right earpiece for 10 seconds until the indicator flashes red and white.
3. Repeat the same for the left earpiece.
4. Place both headphones back in the case and close the lid for 15 seconds.
5. Open the case – the headphones should automatically sync (the indicators will light up with permanent white).

If the lights flash alternately red and white, it means that the headphones are trying to sync, but they can't.

• Repeat the procedure again, holding the buttons 2-3 seconds longer.
• Check if the cover or protective film blocks contacts in the case.
• Try connecting your headphones to another device (like a tablet) to rule out a smartphone problem.

⚠️ Attention: On Redmi Airdots 3 Pro models, touch panels only respond to double tapping (rather than long hold). To reset, you need to quickly touch the panel twice on each headphone, then place them in a case.

Synchronization Features for Redmi Airdots 3 Pro and Redmi Buds 4

Redmi Airdots 3 Pro and Redmi Buds 4 models use the updated Bluetooth 5.2 chip and support LE Audio technology, which changes the synchronization process.

Redmi Airdots 3 Pro and Redmi Buds 4 also have sync via the Mi Home app:

1. Open Mi Home and go to Devices → Add Device → Headphones.
2. Choose your model and follow the instructions on the screen.
3. If the app offers to update the firmware, agree. This often solves synchronization problems.

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If after updating the firmware headphones stopped connecting, do a reset via Mi Home: go to the settings of the device and select Reset to factory.

What to do if the synchronization is not working?

If none of the methods worked, check the following points:

• 🔌 Case problems, try charging the case from another cable or power supply. USB-Case port does not allow headphones to synchronize correctly.
• 📲 Smartphone firmware conflict on some Xiaomi devices (especially with the MIUI 12.5 and below) there are Bluetooth bugs. Update your smartphone or try connecting your headphones to a different brand of device.
• 🔊 Hardware malfunction: If one of the headphones is silent (even system signals), the speaker or battery may be damaged.

To diagnose hardware problems:

1. Try connecting each headphone individually in mono mode (if the model supports it).
2. Listen to whether the earphone emits sound signals when turned on / off (for example, a voice greeting).
3. Check if the earphone is heating up while charging. Lack of heating may indicate a battery failure.

⚠️ Warning: If the headphones have been in contact with water (even if the model has protection) IPX4), The synchronization may be disrupted by corrosion of the contacts, requiring disassembly and cleaning by a specialist.

How to avoid synchronization problems in the future

To headphones Redmi Airdots do not lose communication with each other, follow the simple rules:

• 🔋 Charge your headphones regularly. Don't let the full discharge (below 5%) Use the original Xiaomi cable or a certified USB-Type-C.
• 📱 Don’t connect your headphones to multiple devices at the same time, which can cause Bluetooth profile conflicts.
• 🎧 Take the earbuds out of the case at the same time, and if one earbud is activated later than the other, the synchronization may not go through.
• 🔄 Update your firmware. In Mi Home, check regularly for updates for your model.

For models with support for LE Audio (Redmi Airdots 3 Pro, Redmi Buds 4) it is also recommended:

• Turn off the energy-saving mode on your smartphone, as it can limit the operation of Bluetooth 5.2.
• Use high quality codecs (e.g. AAC or LC3) in Bluetooth settings.

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FAQ: Frequent questions about Redmi Airdots synchronization