Xiaomi AirDots’ modern wireless headphones have become incredibly popular because of their affordable price and decent sound quality. However, like all electronics, they sometimes encounter software failures when the left and right headphones stop "hearing" each other. Instead of stereo sound, the user hears music in only one ear, and trying to play audio is annoying. This problem is known as out-of-synchronization, and it does not mean that the device is broken.
In most cases, you can restore the gadget yourself without going to the service center. The process requires a certain sequence of actions that forces the Bluetooth modules inside the case and the headphones themselves to find each other again. It is important to understand that a standard disconnect in the settings of the smartphone will not help here, because the problem lies deeper in the internal logic of pairing the headphones themselves.
Further instructions will be suitable for most models in the series, including Redmi AirDots, Xiaomi Earbuds Basic and their modifications. We will not only analyze the standard algorithm of actions, but also consider the complex cases when you need a full reset or manual reboot.
Why the headphones stop syncing
Before we get into action, we need to understand the nature of the failure. Often users are looking for ways to synchronize Xiaomi AirDots with each other without understanding what happened in the system. The main reason lies in violation of the TWS protocol (True Wireless Stereo), in which one headphone (master) broadcasts the signal to the second (driven), and if this connection is broken, the stereo effect disappears.
The second common cause is different charge levels or incorrect contact pads in the charging case: if one headphone is 100% charged and the second only 80% due to poor contact, their internal controllers can work asynchronously, and background processes in the smartphone, cached Bluetooth protocol errors or interference from third-party applications also affect.
Sometimes a crash happens after you update your phone's operating system or change your playback device. Older connection profiles can conflict with new pairing requests. It's critical to understand that unless the headphones are reset and reconnected, the phone will see them as two different devices or just one.
Preparation for discharge and synchronization
The success of the operation depends on 90% of the correct preparation. Don't immediately poke the buttons at random. First, you need to completely clear the connection history. Go to your smartphone's Bluetooth settings, search the list of Xiaomi AirDots (or Redmi AirDots) devices and select the option "Forget device" or "Unpair".
After that, be sure to turn off Bluetooth on your phone.This will prevent you from trying to automatically reconnect during setup, which can knock the sync between the headphones themselves. Make sure that both headphones are in the charging case and have sufficient charge - preferably at least 50%.
Look at the contact groups. There are little metal dots on the bottom of each earpiece and inside the case, wipe them with a dry soft cloth or cotton swab soaked in alcohol, and dirt or oxidation can prevent the signal from starting charging or resetting.
☑️ Preparation for synchronization
The method of complete soldering (Hard Reset)
The most effective way to sync Xiaomi AirDots with each other is to perform a hard reset. This method causes the headphones to forget all previous settings and re-find the pair. Take both earphones from the case. Make sure they are turned off (the indicators do not burn). If they are on, press the touch or mechanical buttons on both headphones at the same time and hold for about 5-7 seconds until the indicators go out.
Now the most important step is to press the control buttons on both headphones simultaneously and hold them for 20 to 30 seconds. Don't let go of the buttons even if the indicators start flashing. First they light up red, then they can flash white or red several times. Your goal is to wait for the indicators to blink 2 or 3 times and go out (or light up red and go out, depending on the model).
After a successful reset, put the headphones back in the charging case. Wait a few seconds until they start charging (the red light will light up). Then retrieve them. Now they must automatically sync with each other: one of the headphones (usually the right one) will flash quickly white, waiting for connection, and the second one should flash less often or not at all, while in the waiting mode for connection to the first one.
What to do if the indicators do not flash?
The process of connecting to the smartphone after reset
Once you've made sure the headphones are synchronized (only one flashes, usually on the right, or they blink in unison, but slowly), you can switch to connecting your phone. Turn on Bluetooth on your smartphone and start looking for new devices. Only one device called Xiaomi AirDots or Redmi AirDots should appear on the list.
If you see two identical devices (for example, two devices "AirDots_R" or "AirDots_L"), So, you don't have a synchronization between the headphones, so you need to repeat the reset procedure, focusing more on the simultaneous clamping of the buttons. If you have one device, you can press it to pair it.
Once you're connected, check the sound. Turn on the music and take each earpiece out of your ear in turn. The sound should stay in both speakers, even if you're holding only one of them (mono mode), and if the sound disappears in one ear when you remove the other, then the stereo mode is not activated, and you need to repeat the procedure.
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Use third-party apps to check your balance. Play Market has utilities like Bluetooth Mono/Stereo Checker that visually show you what mode your headphones are running in.
Table of indicators and their values
Understanding color can help diagnose the condition of a device without a phone connection. Different Xiaomi and Redmi models may have slight variations in LED behavior, but the overall logic remains the same.
| Status of the indicator | Colour | Meaning |
|---|---|---|
| Slow blinking | White | The waiting mode of connection (Pairing Mode) |
| Fast blinking. | Red and white | Interconnection mode / Resetting settings |
| It's burning all the time. | Red. | Charging is in progress. |
| It's burning all the time. | White | The headphone is charged or connected to the phone |
| Double blinking. | Red. | Low battery charge (less than 10%) |
Note that in some firmware versions, the white indicator can mean plug-in and the red one means charging, but double blinking in red almost always indicates a critical discharge. If the earphone flashes red and goes out immediately, its battery requires immediate recharging.
Solving Channel Dissynchronization Problems
There are times when you're connected, but you only have the left channel or the right channel, and you've got a Stereo in your phone settings, and it could be a software glitch on your smartphone, and you can look up "Hearing Improvement" or "Audio Balance" in your Accessibility settings, and make sure that the slider is right in the center.
It’s also worth checking if Mono-audio is activated on Android or iOS. If this mode is enabled, both channels collapse into one, and sometimes the system mistakenly directs it to only one TWS device.
⚠️ Attention: If one earphone is silent after all the procedures, try discharging both earphones to zero. Leave them on outside the case for a few hours until they completely stop responding. Then charge and repeat the synchronization procedure. This helps to reset the residual charge in the controller capacitors.
Features of Xiaomi and Redmi models
The Chinese giant's budget headphone lineup is extensive, with AirDots 1, 2, S, Pro and Redmi Buds all having nuanced controls, such as some versions of the reset button not on the headphones themselves, but inside the case (a small hole), which means you need to use a clip by pressing the button inside with the lids open.
For tap-control models, the reset process is similar to mechanical: a long touch (about 20 seconds) to a characteristic signal or a change in the color of the indicator. The main thing is synchronization of actions. If you pinch the right earphone for 20 seconds and the left earphone for 22, the reset may not go correctly.
Global and China owners should be aware of the differences in voice assistants, but this rarely affects basic Bluetooth synchronization. However, if the headphones were bought in different markets (for example, one from a lost pair, a new one), they may not sync due to different firmware versions, in which case only an update through the Xiaomi Earbuds app (for supported models) or hope for compatibility will help.
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A key success factor is the simultaneous pressing of the buttons on both headphones for a long time (20+ seconds) before the characteristic reset signal.