The situation when wireless headphones stop working in pairs is one of the most common problems owners have. TWS-The user pulls the device out of the case, but the sound comes from only one earbud, or the left and right channels play different tracks, creating chaos instead of music, a phenomenon often called dissynchronization or loss of communication between the ears. Owners of Xiaomi, Redmi and Poco equipment face this regularly, as Bluetooth protocols sometimes fail when switching between devices.
The main reason is the architecture of True Wireless Stereo, where one headphone acts as a master and the other as a Slave, receiving a signal from the first. If the communication between the two is broken, the stereo falls apart, and each device begins to behave as an independent sound source, which can happen after updating the smartphone operating system, battery discharge in the case, or a banal software failure. Understanding the nature of the problem is the first step to fixing it, since in most cases the hardware part of the device is completely functional.
In this article, we will discuss in detail the synchronization recovery algorithms that will help to resuscitate your gadgets. We will look at the methods of forced reset, cleaning the pairing lists and the specific nuances of working with the Xiaomi Earbuds application. You do not need to carry the device to the service center if the problem is of a software nature, which happens in 90% of cases.
Reasons for desynchronization TWS-headphone
Before you start taking action, you need to understand what caused the disconnect between the channels. Most often, the culprit is a Bluetooth address conflict, when the smartphone “remembers” the headphones as two different devices instead of one stereo. This often happens if you connected the headphones to another phone or tablet without disconnecting them from the main source.
Another common cause is the uneven discharge of the batteries inside the case or the headphones themselves. If one earphone is completely discharged and the other one is still charged, the balancing system may not have time to synchronize their status when placed in the case, resulting in the devices not “seeing” each other when removed, and external factors such as powerful sources of radiation or overloaded ether in crowded places also affect.
⚠️ Warning: If one of the headphones has been at critically low charge for a long time, its battery could go into a deep discharge. 15-20 minutes in the case to "wake up" before trying to synchronize.
Failures in the firmware of the headset itself can also lead to loss of communication. Manufacturers periodically release updates that fix Bluetooth protocol bugs, but sometimes the new version of the software contains errors. If the problem occurs immediately after the update, there is a high probability of a software conflict, in which case a complete reset to factory settings helps.
Basic setup and cleaning of the pairing list
The first and most important step to take before any manipulation is to completely clear the connection history on your smartphone. While the phone tries to automatically connect to the old profile, the new settings will not apply. You need to go to your device's Bluetooth settings, find your Mi True Wireless Earbuds or Redmi Buds in the list, and select the option "Forget the device" or "Delete." If there are duplicates (for example, two devices with the same name), delete them all.
When removed, you need to turn off Bluetooth on your smartphone completely. Don't just turn off the widget in the notification curtain, which is the switch in the settings. This will reset the Bluetooth stack of the operating system. While the headphones are in the case, close the lid and wait 10-15 seconds. Then open the lid, but don't remove the headphones. Make sure the indicators are on or flashing, which indicates that there is a charge and readiness to.
Now turn on Bluetooth on your phone again and start looking for devices. Importantly, at this point, the headphones should be in pairing standby mode. Usually this is reported by a quick flashing white indicator on the case or the headphones themselves. If the indicator is on or not on, you may need to manually log in (more on this below).
☑️ Cleaning of the pairing
Hard Reset (Hard Reset) Methods
If a simple reconnection didn’t work, you need to perform the Hard Reset procedure, which brings the headphones back to the factory settings and makes them “get to know” each other again, ignoring old saves. Most Xiaomi and Redmi models have the same algorithm, but there may be nuances in the length of the button retention.
Place both earbuds in the charge case and open the lid. Find the function button on the case case body (usually located between the indicators or on the end). Press and hold this button for 10-15 seconds. The indicator should start flashing white, then it can flash red or orange, and only then light up white again.
For models without an external button (such as some versions of the Mi True Wireless Earbuds Basic 2), the reset is done via touch panels. Remove the headphones from the case. simultaneously touch the touch zones on both headphones and hold your finger for about 5 seconds before turning off. Then, putting them back in the case, press the sensors again for 20 seconds until the indicators in the case light up orange.
⚠️ Warning: Do not remove the headphones from the case or close the lid during reset unless the instruction requires otherwise.
After a successful reset, the headphones will go into active pairing mode. Connection animations may appear on the smartphone screen (if you use MIUI and the Xiaomi Earbuds app). If you don't have animation, just find the device in the Bluetooth list and click "Plug in." Now the left and right channels should work synchronously.
What to do if the reset button does not respond?
Working with the Xiaomi Earbuds app
For Android smartphone owners, especially those with MIUI or HyperOS shells, it is critical to use Xiaomi’s proprietary Earbuds app (formerly Mi Buds), which not only tracks charge, but also manages deep synchronization settings. Often the problem of channel “disorder” is solved by updating the firmware through this app.
Inside the app, there's a Settings section where you can find "Two-Track Mode" or something like that. Make sure it's activated. The app may also suggest updating the firmware of the headphones. The firmware update often contains patches to stabilize the Bluetooth connection. The process takes a few minutes, and the headphones should be next to the phone, and the device screen should not go out.
The app also has a feature to search for headphones and check the status of each ear separately, so if the app shows that one of the headphones has a charge of 0% or is not detected while it is in the case, this may indicate a problem with the contacts or the battery itself, rather than a software failure synchronization, in which case the software methods may be useless.
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Use the Xiaomi Earbuds app to calibrate your sensors. Sometimes, a faulty take-off/insert sensor causes one earbud to think it's in the ear and the other to think it's in the case, ripping the stereo pair apart.
Comparative table of discharge models and methods
Different lines of headphones can have their own characteristics of entering the pairing mode. Below is a table that helps to navigate the methods for popular models.
| Model headphones | Type of discharge | Indication of success | Features |
|---|---|---|---|
| Redmi Buds 3 / 4 | Case button (10 seconds) | White flashing | An application is required to fully customize |
| Mi True Wireless 2 / 2S | Case button (15 seconds) | Orange blinking | Support for wireless charging |
| Basic 2S / Essential | Sensors (20 seconds in case) | Indicators go out/burn | No button on the body, complex reset |
| FlipBuds Pro | The button on the case | White light | Noise suppression affects synchronicity |
As you can see from the table, having a physical button makes it much easier to do this, because in low-end models where there's no button, you have to dance with a drum around the touchpads. It's critical to keep the timing: if you let your fingers go at 19 seconds instead of 20 seconds, you don't reset, and the headphones just turn off.
Diagnostics of hardware faults
If none of the software methods worked, and the headphones still don't want to work together, maybe it's the hardware. First of all, check the charging. Put the headphones in the case and plug it into the network. Are the indicators on? If one earphone shows no signs of life even after an hour of charging, maybe its battery has failed or the contacts inside have oxidized.
Carefully examine the contacts on the headphones themselves (metal pads) and the pins in the case, they should not be plaque, pile or oxides, wipe them with alcohol or dry cloth. Dirt on the contacts is a common reason why one earphone does not charge and therefore does not pair.
⚠️ Attention: Moisture entering the earphone (sweat, rain) can cause the controller to short circuit. If the device has been in water, you can't dry it with a hair dryer, it will drive moisture deeper. Use silica gel and leave it on. 2-3 day-day.
It's also worth checking with another smartphone, plug your headphones into a friend's phone or tablet, if they work perfectly, the problem is with your phone's Bluetooth module or settings, and if the other device still has a problem (only one channel works), the fault lies in the headphones themselves.
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If after reset, cleaning contacts and checking on another device stereopara is not restored, likely hardware breakdown Bluetooth module in one of the headphones.