A situation where two are removed from the case TWS-The smartphone sees and plays sound through only one of them, is a common problem for owners of equipment Xiaomi, Redmi and Haylou. Users often find that the Bluetooth list displays a device without the prefix "L" or "R", and the second module remains in standby mode or simply does not respond to commands.
In most cases, the root is a software failure synchronization between the left and right modules. Headphones lose communication with each other and start to work as two independent mono-devices, one of which has managed to connect to the phone, and the second — not.
Don't panic and bring your gadget to the service center right away. There are a number of effective methods to restore the pair at home. In this article, we will detail the algorithms for forced pairing, resetting and diagnosing hardware malfunctions so that you can enjoy stereo sound again.
The main reasons for dissynchronization TWS-headset
Understanding the nature of a problem is the first step to successfully solving it, and when only one Bluetooth earphone is connected, the system often perceives it as a regular mode of operation, known as "Mono Mode," which is activated when the right module (which is usually a master device) cannot find the left one, and there can be several reasons for this behavior, from banal dirt on contacts to complex profile conflicts.
Users often forget that modern TWS-And the way that these models work is that if you've previously connected your headphones to another smartphone or tablet, and they're stuck in your memory, the new gadget might be trying to make a monolink, and the charge is also affected. if one headphone in the case had poor contact with pins and was discharged to zero, and the second retained charge, only the charged module will be turned on when extracted.
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If one earphone is zero, leave both modules in the case charging for at least 30-40 minutes, even if the indicators show full charge at once.
Another factor is the presence of many stored devices in the phone's memory.A smartphone can automatically try to connect to the last active profile, ignoring the attempt to create a stereo pair.It is important to understand that Bluetooth sometimes requires manual intervention to restart the process of shaking hands between the components of the headset.
Basic reset and reconnection of the device
The most effective way to get Xiaomi headphones back to work in pairs is to perform a full Hard Reset, which clears the modules’ internal memory of old pairing profiles and forces them to re-find each other. Before you start, make sure that both headphones are in the case and have sufficient charge.
The reset process may vary depending on the model, whether it’s Mi True Wireless Earbuds, Redmi Buds or more budget series. However, the general principle remains the same: you need to initiate flash or reset mode through prolonged retention of touch zones or mechanical buttons. After that, the device goes into pair search mode, and in the Bluetooth list it can appear as a new, unknown device.
☑️ Complete reset algorithm TWS
Once you reset, it's critical that you reconnect correctly. Don't rush to press "Plug" right away. Give your gadgets a few seconds to internal sync. If you have two devices with the same name on the list or one device with the name "Dual", choose the right one. Ideally, you should choose one device that will broadcast the sound to both channels.
⚠️ Warning: During the reset procedure, do not close the case cover and keep the smartphone at a distance of at least 1 meter.
Method of forced pairing of the left and right module
If a standard reset didn't work, and only one Xiaomi wireless headphone still works, a forced synchronization method will be required. The essence of the method is to "cheat" the system into thinking that this is the first turn on. First, completely delete (forget) the device in your smartphone's Bluetooth settings.
Then turn off Bluetooth on your phone completely. Put both headphones in the case, close the lid and wait 10 seconds. Now remove both modules at the same time. Don't touch them with your fingers in the sensor area so you don't activate them prematurely. Wait for the lights to flash (usually white or red, depending on the model). Only after that turn on Bluetooth on the phone and start searching.
The secret of simultaneous extraction
In some models, such as the Mi True Wireless Earphones 2, there is a special combination: touch the touch areas of both headphones at the same time 5 times, this force them to pair, if you hear voice confirmation "Pairing" or "Connected", then the stereo is restored.
Diagnostics of hardware problems and charging
When software methods are exhausted, you should pay attention to the physical condition of the gadget. When one headphone is connected, often masks the problem with charging one of the modules. Visually, the indicator may burn, but the actual energy accumulation does not occur due to the oxidation of the contacts.
Carefully examine the golden contacts on the headphones themselves and inside the case, which often accumulate earwax, dust or oxides that create resistance. Wipe the contacts with a dry lilac wipe or cotton swab slightly soaked in alcohol. Make sure that the magnets in the case tightly attract the earpiece and it does not stagger.
It's also worth checking the speakers. Sometimes it looks like the earphone isn't connected, but it's actually just quieter or the sound channel is shifted in the balance. Check the balance settings in the Special Features section of your Android smartphone. If the slider is shifted towards one channel, the second earphone will seem non-functioning.
| Symptoms. | Possible cause | Method of decision |
|---|---|---|
| Only one indicator is on. | Battery discharge or contact oxidation | Cleaning contacts, long-term charging |
| List 2 devices with one name | Lost synchronization between modules | Remove both, reset, reconnect |
| There is a sound, but only in one ear. | Balance failure or mono mode in applications | Checking the balance settings in the OS |
| The earpiece flashes red. | Critically low charge or fee error | Charging more than 1 hour, checking the cable |
Features of working with the Xiaomi Earbuds application
For owners of the original Xiaomi and Redmi equipment, the real salvation is the Xiaomi Earbuds app (or Mi Wear for older models), which allows you to see the status of each module separately. If the application displays a charge of the left earphone 0% and the right earphone 80%, the problem is clearly in charging the left module.
Through the app, you can often update the firmware of the headphones. Outdated software can contain bugs that cause an unstable connection. Update through the application is automatic and often corrects Bluetooth protocol errors that lead to desynchronization.
You can also find headphone search or additional sensor calibration in the app settings. If the app sees both devices but the sound goes to one, try the "Reset Headphone Settings" item in the app menu, which runs deeper than the standard Bluetooth reset of the phone menu.
⚠️ Warning: Do not interrupt the firmware update process through the app. If the battery dies during the upgrade, the earbud can turn into a "brick" that cannot be restored without service equipment.
Third-party device influence and profile conflict
A common cause of problems is the "junk" in the Bluetooth memory of other devices. TWS-headphones have previously connected to a friend's laptop, tablet, or phone, and Bluetooth is on, and they can automatically try to connect to them. In this case, your current phone sees the device, but can't take control of the sound transmission.
It is recommended to temporarily disable Bluetooth on all surrounding devices. Leave only your smartphone active. This will eliminate the possibility of intercepting the connection. It is also worth clearing the list of paired devices on the phone from all old, unused headsets to free up the Bluetooth stack cache.
Codec switching sometimes helps. In the Android developer menu, you can try changing the Bluetooth Audio Codec settings (for example, from AAC to SBC or vice versa), which can help if the problem is caused by codec incompatibility when transmitting stereo signals.
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The main cause of problems with connecting one headphone in 90% of cases is the desynchronization of the pair, solved by a complete reset and re-pairing with the Bluetooth turned off during the extraction stage.