The situation when a pair of wireless headphones Xiaomi or Redmi sound is heard from only one device, is one of the most common complaints of users: it can happen suddenly during a call, listening to music or watching a video, turning a quality gadget into a useless piece of plastic, most often the problem lies not in the physical breakdown of the speaker, but in the desynchronization of channels or software failure, which is easy to fix.
Owners of models like AirDots, Redmi Buds or Mi True Wireless face this regularly because of the Bluetooth protocol and charging cases. Before you carry a device to a service center or buy a new pair, you should eliminate simple operating errors.
In this article, we will discuss in detail the algorithms of actions to restore full stereo sound. You will learn how to perform a hard reset, clean contacts and check the settings of the smartphone to return the gadget to full functionality without unnecessary costs.
⚠️ Warning: If the headphones fall into the water or have been subjected to a severe mechanical impact before one of them is silent, software methods may not help.
The main causes of sound loss in one of the channels
Understanding the nature of a malfunction is the first step to a successful repair. TWS-The connection between the left and right ears is critical. If one Xiaomi earphone stopped working, it is often due to a data failure between the modules inside the charging case or with the smartphone itself.
One of the main causes is contamination of the contact areas: fine dust, earwax or oxidation can prevent one of the headphones from charging while it is in the case, resulting in the device discharged to zero and goes into deep sleep, from which it cannot come out on its own when the lid is opened.
Another common factor is the software glitch of the smartphone operating system or firmware of the headphones themselves. Updating Android or MIUI sometimes changes the priorities of the Bluetooth connection, which causes the phone to “see” only one device from a pair. It is also worth considering the wear of the battery: if one earphone is already 2-3 years old, its battery could degrade faster, and it simply stops holding charge.
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Check the charge indicators on both headphones. If one doesn't catch fire when placed in the case, the problem is almost certainly contamination of the contacts or battery failure.
Basic diagnostics and charging check
The first thing you need to do is eliminate the trivial discharge, and even if the indicator on the case is on, it doesn't guarantee that the charge is transmitted to both earphones evenly. Visual inspection and simple cleaning often solve the problem of the silent channel.
Carefully examine the golden contacts on the bottom of each earpiece and pins inside the charging case, which should be free of plaque, dust or film. Use a dry cotton swab or stick slightly soaked in isopropyl alcohol to clean. Do not use water or aggressive chemicals, as moisture inside the case will corrosion the board.
After cleaning, place the headphones in the case and leave them to charge for at least 30-40 minutes, even if the indicators show full charge. Sometimes the power controller takes time to wake up the deeply discharged cell. Make sure the case itself has enough charge.
- 🔌 Check the serviceability of the charging cable and the power supply by connecting the case to another energy source.
- 🧹 Carefully clean the speaker and microphone grid, as the clogged sound can be perceived as a complete lack of audio.
- 📱 Make sure that the Bluetooth settings of the smartphone sound balance is set in the middle, and not shifted completely to one channel.
The method of complete reset (Hard Reset) for TWS-model
If cleaning and charging didn't work, you have to do a forced reset, and that's the most effective way to get the Redmi or Mi headphones to "find" each other again and combine into a stereo pair, and the procedure may vary slightly from model to model, but the general principle is the same.
First, remove (forget) the device from your smartphone's Bluetooth menu. Then place both earbuds in the charge case and leave the lid open. Find the function button on the case (usually round and located between the indicators or on the end). Press and hold it for 15-20 seconds.
The indicators should start flashing red and white (or white and orange) to signal the transition to pairing mode. Then do a search on the phone again. It is important to reset when both earbuds are in the case so that the sync goes correctly.
☑️ Algorithm reset headphones Xiaomi
Specificity of reset for models without a button on the case
Some budget models, such as AirDots or Redmi AirDots, don’t have a physical button on the case itself, and in such cases, the reset procedure is performed directly through the touchpads of the headphones while they are out of the case.
Remove both earbuds from the case. If one of them doesn't work, first try activating it by quickly pressing the touch zone 5 times in a row. When both earbuds start flashing (usually in red), press the touchpads on both devices simultaneously and hold for about 20 seconds. The indicators should go out and then light up again, which means a successful reset.
After this manipulation, the headphones must automatically connect to each other (one of them will blink a couple of times and stop, the second will continue to blink while waiting for the phone), only after that you can turn on Bluetooth on the smartphone to pair.
| Model headphones | Type of discharge | Action. | Indication of success |
|---|---|---|---|
| Redmi AirDots / Mi True Wireless | Sensory | 5 quick presses + 20 seconds of retention | Triple flashing. |
| Xiaomi Air 2 / 2S / 2 Pro | The button on the case | Holding the button 15 seconds | White flashing |
| Redmi Buds 3 / 3 Pro | The button on the case | Holding the button 10-15 seconds | Orange blinking |
| Mi True Wireless Earbuds Basic | Sensory | Holding 20 seconds out of the case | Turning off the indicator |
Settings of the smartphone and the Mi Wear app
Sometimes the problem isn't with the headphones themselves, but with how the smartphone manages the audio stream. There are settings in the Android operating system and the MIUI shell that can block the second channel, and it's also worth checking for firmware updates through the proprietary app.
Xiaomi ecosystem owners are strongly encouraged to install Mi Wear (formerly Mi True Wireless) app, which allows you to see the actual charge level of each headphone individually and perform firmware updates. Often desynchronization bugs are fixed with software patches.
Go to your phone's special features settings. There may be a Mono-audio feature activated, which brings the stereo into one channel. Also check the sound balance: Settings → Sound and vibration → Sound quality and effects → L/R balance. The slider should be strictly centered.
⚠️ Note: When updating the firmware of the headphones through the application, make sure that both headphones are in the case or next to the smartphone, and the charge of the case is more than 50.
Software Conflicts and Bluetooth Cache
If none of the above methods worked, it is possible that the smartphone system has accumulated software debris that interferes with the correct operation of the Bluetooth stack.Resetting network settings or cleaning the Bluetooth cache can resuscitate the connection.
In the developer menu (which is activated by seven clicks on the build number in the About Phone section), you can find the option “Reset Bluetooth settings.” This action will remove all stored devices and return the module to factory settings. This is a radical but often effective method.
It’s also worth trying to connect the headphones to another device (another phone, tablet or laptop).If both headphones work properly on the other gadget, then the problem is precisely in the settings or hardware of your main smartphone.
Secret code for diagnosis
When repairs or replacements are needed
If all the software manipulations, cleaning and resets have failed, and on another device the earphone is also silent, most likely there is a hardware malfunction. TWS-headphones most often fail batteries or dynamic emitters themselves.
Replacing the battery in these miniature devices is a complex process that requires careful opening of the case (often without visible seams) and working with a soldering iron. The speakers are also rarely repaired and change completely. If the warranty is still valid, you should contact an authorized service.
If the warranty expires and the repair costs are high, it is sometimes easier to buy a new model, but if you have a skill with small electronics, you can try to gently open the case of the non-working earphone and check the voltage on the battery contacts with a multimeter.
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If one earphone does not work on any device and does not respond to the indication when charging for an hour, most likely, its battery or charge chain has failed.