The situation when Xiaomi wireless headphones stop working in pairs and begin to reproduce sound only on one side or play different tracks, is familiar to many owners. TWS-This phenomenon is called out-of-synchronization, and it can occur due to a software failure, battery drain, or problems with the smartphone's Bluetooth module. The user suddenly finds that the left and right channels have lost communication with each other, turning listening to music into chaos.
Fortunately, most of the time, there's no hardware breakdown, and the device is fine, and the problem is that the connection protocol is logical, and sometimes it forgets which headphone is the master and which is the slave, and it usually takes one to five minutes to recover from normal operation if you do the right reboot and mating sequence.
In this article, we will discuss all possible causes of desynchronization in detail and offer step-by-step instructions to eliminate them. You will learn how to correctly perform hard reset for Redmi Buds, Mi True Wireless Earbuds and other popular versions. It is critical not to try to connect headphones to your phone until you complete the procedure of completely resetting the settings inside the case.
The main reasons for dissynchronization TWS-headset
Before you start to act, you need to understand the nature of the failure. Wireless headphones use a complex communication system, where one channel (usually the right one) acts as a master transmitter from the phone, and the second one receives it. If this chain is broken, you get out of sync. Most often the culprit is the Bluetooth buffer of the smartphone, which has accumulated connection errors.
Another common cause is the uneven discharge of the batteries: if one earphone is completely discharged and turned off earlier, and the second one continues to work, when they are placed in the case and then charged, they can “forget” each other, and third-party applications that intercept audio control, or firmware updates that have passed with an error, also influence.
Sometimes the problem is physical interference or contamination of contacts. Oxidation of charging pins on the headphones themselves or inside the case can cause the device to not receive a signal to start charging and not restart correctly. In rare cases, the fault is Android power saving settings that aggressively “kill” the background processes of Bluetooth.
⚠️ Warning: If one of the headphones emits an intermittent squeak or flashes an indicator at a different frequency, this may indicate a deep battery discharge. 30-40 minutes before settings start.
Basic Reboot and Delete Device Profile
The very first and often the most effective step is to completely clean up your connection history. Xiaomi smartphones and other Android devices tend to keep old configurations that may conflict with the current state of the headset. You need to forcefully break communication at the phone's software level.
To do this, go to your smartphone’s Bluetooth settings. Find your headphones (like Redmi AirDots or Mi True Wireless Earphones) in the list of devices. Click on the gear icon or the “i” icon next to the name and select the “Forget the device” or “Disable” option.
Now put both earbuds in the charge case. Make sure they fit tightly to the contacts and the charging indicators are on. Close the case cover (if you have one) and wait 10-15 seconds. Then open the case, but don't press any buttons yet. This simple algorithm allows you to reset temporary connection errors.
Instructions for the complete reset (Hard Reset) of headphones
If just deleting the profile didn't work, you need to perform a hardware reset to factory settings, which is a procedure that forces left and right channels to reunite, ignoring previous settings, and the reset technique may vary slightly depending on the model, but the general principle remains the same.
Remove both earbuds from the case. Make sure they're off (indicators don't burn). If they're turned on automatically when you retrieve them, press and hold the touch zones on both earbuds simultaneously for 5-7 seconds until the lights go out. Now that the headphones are off, press the touchpads (or physical buttons) on both devices simultaneously and hold them for about 20-30 seconds.
It's important to keep the buttons on, even if the headphones turn on. You need to wait for the moment when the indicators flash several times (usually 3-4 times red or white) and go out or change the pattern of blinking. This is a signal that the reset has been successfully passed. After that, place the headphones back in the case, close it and open it in 5 seconds to re-pair.
☑️ Complete reset algorithm TWS
For some models, such as older versions of Redmi AirDots, the procedure may require triple tapping the touch area when switched off. In this case, quickly press the button three times, then press and hold it for the fourth time. The exact combination for your model is better specified in the instructions, but the long-clamp method works 90% of the time.
Synchronization Features for Different Xiaomi Models
Xiaomi’s audio lineup and sub-brands (Redmi, Poco) are vast, and the control nuances may vary. Understanding your model will help avoid errors. For example, Mi True Wireless Earphones 2 often requires you to take turns to remove the headphones for proper initialization.
| Model headphones | Type of management | Feature of discharge | Indication of success |
|---|---|---|---|
| Redmi AirDots / Mi True Wireless Earbuds Basic | Touch/Button | Triple press + long clamping | Double blinking. |
| Mi True Wireless Earphones 2 / 2S | Touch-sensitive | Hold both headphones for 15 seconds | The indicator goes out |
| Xiaomi FlipBuds Pro | Touch-sensitive | Through the Mi Buds app or the case button | Sound signal |
| Redmi Buds 3 / 4 Lite | Touch-sensitive | Clutch sensors 5 times in a row | Triple flashing. |
Owners of advanced models with active noise cancellation (ANC) are recommended to use the official Mi Buds or Xiaomi Earbuds app. In the settings inside the application, there is often a “Reset Headphones” function that performs all the necessary commands automatically, without dancing with a drum around the buttons.
What to do if the buttons do not respond?
Problems with connecting only one headphone
A common situation is that after all the manipulations, the phone sees the device, but the sound comes from only one channel, or the second channel is simply silent, which means that the process of pairing the left and right earphones with each other has not ended. They work in mono or independently of each other.
To fix this, you have to eliminate the phone from the equation. Turn off the Bluetooth on your smartphone completely. Put both headphones in the case. Pull them out and wait until they blink (search mode). If they blink differently or at different intervals, there is no connection. Repeat the reset procedure described above until the blinking rhythm is identical.
Mono mode is sometimes switched on randomly. Check if this feature is activated in Android special features. Go to Settings → Special features → Hear and make sure the Mono-audio switch is turned off. If it is on, the sound from both channels is mixed and only fed to one speaker.
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Useful tip: When pairing again, first connect the headphones to the phone, and then turn on Bluetooth. This helps the device to determine the priority of the master channel faster.
Bluetooth settings and Android energy saving
An Android system, especially one with a MIUI or HyperOS shell, can aggressively optimize Bluetooth modules to save battery life, causing the headphone connection to break or be unstable, and the power settings for system services need to be checked.
Go to Settings → Apps → Show all apps. From the menu, select “Show system processes.” Search under “Bluetooth”, “Bluetooth MIDI” and “Google Play Services.” For each, go to Battery or Energy Saving and select “No Limits” or “No Limits” mode, which will prevent the system from turning off the communication module in the background.
Also, clear the Bluetooth cache. In the same app menu, find "Bluetooth," click "Memory," and select "Clear the cache" (not the data, but the cache). After that, restart the smartphone. This action deletes temporary files that may have been corrupted and caused conflicts when transmitting the audio stream.
⚠️ Attention: Resetting Bluetooth settings (via the developer menu or engineering menu) will remove all stored devices.Be prepared to reinvent the clock, speakers and other gadgets.
Diagnostics of hardware faults
If none of the software methods worked, and the headphones are still working separately or one of them is silent, there is a high probability of physical failure. TWS-Lithium polymer batteries in miniature headphones degrade faster than in phones, especially with frequent deep discharges.
Check the charging contacts. They often accumulate earwax and oxides that block current. Gently wipe the contacts with a cotton swab dipped in alcohol. Also inspect the speaker grid: if it is clogged, the sound will be quiet or absent, which can be mistaken for desynchronization.
In the case when one earphone does not turn on at all (no reaction to charging and buttons), most likely, its power controller or battery itself has failed. In such cases, software repair is powerless, and you need to replace the power element or the entire module in the service center.
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If after resetting, cleaning contacts and reconnecting to different phones, one headphone does not work, the problem is hardware in nature and requires repair.