When one of Xiaomi's wireless headphones suddenly stops working, it's familiar to many users. It can happen at the most inopportune moment: during a workout, an important call or watching a movie. Instead of stereo, you hear silence in one channel or a monotonous crackle, which completely destroys the experience of listening to music. Most often the problem is not a physical breakdown, but a software failure of synchronization between "master" and "slave."
TWS is based on a connection between two independent devices that should work in a perfect bundle, and when one of the circuit elements loses communication with the main module or phone, it becomes out of sync. It doesn't always mean that the gadget is broken completely. In most cases, you can fix the situation yourself without going to the service center.
In this article, we will look at all possible causes, from trivial grid contamination to deep firmware errors, learn how to properly perform a full reset, check battery status, and determine whether hardware repairs are required. Careful follow-up will help to resuscitate the device in 90% of cases.
Main Causes of Outsync and Sound Loss
The first thing that the owner encounters when they break down is not understanding why the device is acting strangely. Often, the desynchronization is because the headphones have forgotten each other. One of them can go into pairing mode while waiting for the connection, while the second one is already connected to the phone and broadcasts the sound only to itself. This is a classic Bluetooth protocol problem where the priority device does not transmit the signal to the secondary one.
Another common cause is a critical battery discharge in one of the channels. Batteries in compact True Wireless models are small in volume, and over time their capacity falls unevenly. If one earphone discharged faster, it could just turn off before you noticed it. Also affected by the state of the charging contacts: oxidation or dust can interfere with normal charging, creating the illusion of complete discharge.
⚠️ Warning: If the headphone makes a squeaky, intermittent, or quiet crackle when you try to turn on, it may indicate that moisture has been ingested on the contacts or speaker.
Software failures in the smartphone operating system can also cause problems. Updating Android or iOS sometimes changes the algorithms for working with Bluetooth profiles, which leads to conflicts with older versions of the firmware of headsets. In rare cases, the culprit is the charging case itself, which incorrectly distributes energy between the compartments.
Diagnostics and checking of battery charge
Before we go into complex code manipulation, we need to rule out the trivial physical reasons. Often the problem is solved by careful cleaning. In earwax or dust, contact areas can clog up on the earpiece itself and inside the case. Use a dry cotton swab or toothbrush for careful cleaning.
Checking the charge level of each channel separately is an important diagnostic step. Put both devices in a case and connect it to the network. Pay attention to the indicators: if one of the headphones does not light up or flashes differently than the other, then the current does not flow to it. This may be due to a wrong landing in the socket. Try to slightly press the non-functioning module with your finger or change its angle of inclination.
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Use a wet (but not wet!) napkin to wipe metal contacts on headphones if dry cleaning didn't help.Oxides often interfere with charging.
In some Xiaomi models, such as Redmi Buds or Mi True Wireless, the indicator inside the case shows the charge of the case itself, not the ears. In this case, put the devices in the case for 15-20 minutes and try to remove them. If one of them does not show signs of life (no beep or light indicator), perhaps its battery has gone into deep discharge.
For accurate diagnosis, you can use third-party apps or widgets on your smartphone that show the charge of each channel separately. If the phone sees only one device from a pair, this confirms a problem with pairing or powering the second module. A critical sign of deep discharge is the lack of response to charging during the first hour of connection to the network.
Full reset and reconnection methods
If the physical diagnostics don't show any problems, you need to do a software reset, which is the most effective way to eliminate the out-of-synchronization, the mating process causes the devices to rediscover each other and assign new roles as master and slug, and don't ignore this step, even if it seems obvious.
To start, remove the device from the Bluetooth list on your phone. Find the name of your headset (such as Xiaomi Buds 3 or Mi AirDots) in the settings and click "Forget the device" or "Unpair the pairing." Then turn off Bluetooth on your smartphone. Now place both headphones in the case and close the lid for 10 seconds so that they turn off.
☑️ Complete reset algorithm TWS
The hard reset procedure follows. Depending on the model, the actions may differ. In most cases, you need to remove the headphones from the case and simultaneously press the touch zones or physical buttons on both devices for 10-15 seconds until the indicators flash red and white (or other color) several times. In case models, you sometimes need to press the button on the case itself.
Once reset, the indicators should flash quickly to signal pairing mode. Turn on Bluetooth on your phone and find the device in the list. It's important to connect that pair, not one of the channels. If two identical names appear on the list, choose one and ignore the second one - they should connect automatically.
⚠️ Warning: Do not bring your headphones close to your face during reset.A loud beep when reconnected can damage your hearing.
Setup via Mi Wear and Zepp Life
For owners of the Xiaomi ecosystem, the official Mi Wear app (formerly Xiaomi Earbuds) or Zepp Life is an indispensable tool. These utilities allow you not only to track the charge, but also to update the firmware, which often solves hidden bugs. Go to the application and check the status of each headphone.
The settings menu often includes a headphone search or calibration function. If the app sees only one device, try manually pressing the connection button inside the interface. You can also check for firmware updates. Installing a new version of the software can fix power management errors that caused one earbud to fall asleep early.
| Model headphones | Supported annex | Resetting function in the annex | Firmware update |
|---|---|---|---|
| Mi True Wireless Earbuds Basic 2 | Mi Wear / Zepp Life | No (button only) | Yes. |
| Redmi Buds 3 Pro | Mi Wear | There is. | Yes. |
| Xiaomi Buds 3T Pro | Mi Wear | There is. | Yes. |
| Mi AirDots 3 | Mi Wear | No. | Yes. |
Sometimes it helps to completely reset the settings of the app itself. Go to your smartphone settings, find the Mi Wear app in the installed program list, and select Clear Data or Reset Settings. Then log in to your Mi Account again and try to connect the headset.
What to do if the app does not see the headphones?
Problems with the speaker and sound tract
There are times when the headphone is technically functional, connected and charged, but it doesn't sound. Or there is a sound, but it's very quiet and distorted. This may indicate a software balance restriction or physical contamination of the membrane. Check the balance settings in the Special Features section → Hearing → Balance of sound on your phone. The slider should be standing strictly in the middle.
If the balance is normal, check the speaker's grid. Earwax is a great dielectric that can completely block the sound wave. Clean the mesh carefully with a soft brush. You can use a special electronics cleaning gel that pulls dirt out of the pores, but you need to do this very carefully so that the liquid does not get inside the case.
Check it on another sound source. Connect your headphones to another smartphone, tablet or laptop. If there's a problem on another device (one channel is silent), it's the headset. If the other device is working, look for the reason in the Bluetooth codec settings or the drivers of your main phone.
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The lack of sound when the indicator is working most often indicates a downed channel balance or contamination of the speaker grid, rather than a breakdown in electronics.
Hardware malfunctions and warranty conditions
Unfortunately, not all problems are solved software, and if none of the above methods worked, there may have been a hardware breakdown, which could be a Bluetooth module failure, a plume detachment inside the housing, or battery degradation. TWS-Headphones are very miniature and sensitive to impacts.
Note the history of use: If the device fell, got wet (even from sweat during sports) or was exposed to extreme temperatures, the likelihood of physical damage is high, in which case self-repair is almost impossible due to the monolithic design of the case and the lack of spare parts available for sale.
⚠️ Attention: Opening the case of Xiaomi headphones almost always leads to loss of warranty and leakage. If the device is warranty, carry it to an authorized service.
Check the warranty period. For original Xiaomi products, it is usually 12 months. To contact the service center, you will need the device itself, the original packaging and check documents (or bank statement / e-cheque). If the purchase was made on the marketplace, print (order details) from the site.