The situation when one of the headphones Xiaomi Airdots stops synchronizing with the other, is one of the most common problems of budget owners. TWS-Users often find that the left or right module works independently, playing sound from only one channel, or the device does not appear in the list of Bluetooth smartphones. This does not always mean hardware failure, often the problem lies in the software failure of the connection logic.
Understanding True Wireless Stereo helps you find a solution faster, and in such systems, one headphone (master) transmits a signal to the second (slave), and if this ligament is broken, desynchronization occurs. Restoring normal operation requires sequential resetting and re-pairing, which we will discuss in detail in this article.
The main reasons for dissynchronization TWS-headset
Before embarking on active repairs, you need to understand the nature of the error, most often desynchronization occurs because the headphones “forgot” each other after discharging the battery or connecting to another gadget, and the device may have retained a conflicting profile that prevents the correct communication between the left and right modules.
Another common cause is radio interference in the Bluetooth zone, if you are near a powerful Wi-Fi router, microwave or a cluster of other wireless devices, the signal may be interrupted, and software bugs of the smartphone’s operating system itself, which may incorrectly distribute the audio stream between channels, should not be excluded.
In rarer cases, the problem lies in the physical condition of the contacts. Oxidation of the charging pads inside the case or on the headphones themselves causes one to not charge until the end and turn off prematurely, breaking the connection. Xiaomi Airdots are sensitive to the purity of the contacts, so contamination can simulate a software failure.
Complete Reset (Hard Reset) procedure
The most effective method of solving the problem is forced reset to factory settings, which clears the internal memory of the headset from all stored pairing profiles, including conflict records. Before starting the procedure, make sure that both headphones are in the case and have a sufficient charge, at least 50%.
To perform the reset, you need to remove both earbuds from the charging case at the same time. Make sure they are not connected to the phone at the moment - it is better to pre-remove the device from the Bluetooth list in the smartphone settings by selecting the option "Forget the device." Now you need to find the touch areas on the cases.
Press the touchpads on both headphones simultaneously and hold them for 20 to 30 seconds. The indicators should flash red several times before going out. This means that the Hard Reset is successful and the headset is ready for a new mating procedure.
☑️ Complete reset algorithm
⚠️ Warning: When holding sensors, do not let go of your fingers until the indicators are turned off or change color. Premature interruption of action may not activate the reset mode, but only turn off the headphones.
Correct sequence of reconjugation
After a successful reset, it is critical to perform the primary pairing procedure correctly, and many users make the mistake of connecting the headphones to the phone immediately after the reset, without giving them time to find each other, first reconnecting the left and right modules, and then connecting them to the smartphone.
Put both headphones back in the case, close the lid and wait 5-10 seconds. Then open the case and remove both devices at the same time, at which point they should automatically find each other: the indicator of one will flash quickly, and the second will flash slowly or go out, which means that the master mode is activated.
Only by making sure that the headphones are synchronized with each other (usually up to 10 seconds after extraction), you can go to search for the device in the phone's Bluetooth menu. Search the list of Xiaomi AirDots (or Redmi AirDots) and click to connect. The sound signal will confirm the successful creation of the stereo pair.
What if the lights flash at different speeds?
Diagnostics of charging and contact problems
Often the reason Xiaomi Airdots headphones don't pair is trivial -- one of them is discharged to zero and can't go into pairing mode. Visually, the indicator may not light up, creating the illusion of a breakdown.
Look at the gold pads on the headphones themselves and the contact pins inside the case, which often accumulate earwax, dust or oxides that block the passage of current. Use a cotton swab lightly soaked in alcohol to clean, but keep fluid out of the case.
Check if the headphones fit tightly in the case, if one of them doesn't sit all the way, the charge won't go. Try pressing the headphone in the case, the indicator should light up. If that doesn't happen, there may be a problem in the case itself or in the charging cable.
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Use a soft bristling toothbrush to clean the speaker mesh and contacts carefully. Dry cleaning is often more effective than wet cleaning, as it eliminates the risk of moisture entering the membrane.
Specifics of working with different models and software versions
Xiaomi and Redmi’s line of devices are constantly updated, and the algorithms for different firmware versions may differ. Airdots S, Airdots 2 or Redmi Buds 3 models may have different button combinations to reset, for example, some new models require holding sensors for 5 seconds to turn off and 15 seconds to reset, which confuses users.
It’s also worth considering that older versions of Bluetooth on smartphones may not work properly with new audio encoding protocols. If you have an old phone, try turning off options like LDAC or AptX in the developer settings, leaving the basic SBC codec, which often increases connection stability.
The table below shows the differences in indications for popular models, which will help to more accurately diagnose the condition of the device:
| Model of the device | Indication of the interface regime | Duration of discharge | Feature |
|---|---|---|---|
| Xiaomi Airdots (1 gen) | Fast flashing white | 20-25 seconds | Sensitive to Wi-Fi interference |
| Redmi Airdots S | Blinking red when discharged | 15-20 seconds | Improved Bluetooth 5.0 Module |
| Xiaomi Airdots 2 | Consecutive blinking | 30 seconds | Mi Wear app is required |
| Redmi Buds 3 Lite | Case indicator | 10 seconds (button) | There's a physical button on the case. |
When a service center is needed: hardware malfunctions
If all software methods, including multiple resets and cleaning contacts, have not yielded results, there is likely a hardware breakdown. TWS-Headsets often fail Bluetooth module inside one of the headphones, especially if the device has been hit or moisture.
It's also possible to wear out the battery, and if one earphone is discharged in 15 to 20 minutes and the other one is running for an hour, the first one's discharge breaks, and the stereo effect goes away, and then the software repair is powerless, and the battery needs to be replaced.
Contacting the service is justified if you observe static interference, cracking even when fully charged, or if the device does not respond to charging at all (the indicator does not light up even after cleaning the contacts with alcohol).
⚠️ Warning: Don't try to open the headphones yourself. They're glued, and when opened, there's a high risk of damaging the fragile battery, which can cause the lithium element to ignite.
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If after three times reset and clear contacts headphones do not see each other, the probability of hardware failure Bluetooth module is more than 80%.