Xiaomi’s modern wireless headphones, particularly the popular Redmi AirDots series (including the Basic, S, 2 and 3 models), have become the benchmark for budget audio. However, owners often face a situation where only one earphone is used when extracted from a case, and the second one remains in sleep mode. This is not a marriage, but a feature of the mono-work mode that is activated when the device is desynchronized.
To make full use of stereo sound, you need to pair two headphones together before connecting to a smartphone. Primary synchronization is a key step that users often miss when trying to search for a device in the phone's Bluetooth menu right away. Without this step, the phone sees two separate mono devices instead of one stereo.
In this article, we will take a look at the algorithm that will allow you to combine left and right channels into a single system, and we will look at the standard procedure, forced reset methods, and solutions for rare software conflicts so that you can enjoy quality sound without interruption.
The principle of operation of TWS and interface modes
True Wireless Stereo (TWS) technology means that headphones can work independently of each other, which allows one earphone to be used to make calls while the other is charging, but to listen to music in stereo, devices must first find each other and create a local network.
The process is this: first, the left and right headphones connect to form a single pair, and then the pair becomes visible to external devices, such as your smartphone or tablet, and if you see two devices with the same name or only one of them on the Bluetooth list, then the internal sync is broken.
It is important to understand the difference between pairing and standby. In standby mode, the indicators may flash rarely, signaling readiness to work, but not to connect. To start a search for a new device, you need to move the headset to a special mode, which we will talk about below.
⚠️ Warning: If you’re trying to connect your headphones without first syncing with each other, your phone may remember them as two different devices, leading to permanent desynchronizations and the need to delete profiles from your smartphone’s memory in the future.
Modern models like Redmi AirDots 3 use more advanced Bluetooth 5.2 protocols that automatically attempt to reconnect, but budget versions (Basic, S) often require manual user intervention to initiate the process.
Preparing headphones for the first connection
Before you start complex manipulations, you need to make sure that the devices are ready to work. The charge of the batteries plays a critical role: if one earphone is discharged more than another, it may not turn on or immediately go into sleep mode, interrupting the mating process.
Place both headphones in a charge case and make sure the lights turn red. Leave them to charge for at least 15-20 minutes, even if they seem charged. This is necessary to align the voltage in the batteries, which is especially important for the correct operation of the Bluetooth controller.
- 🔋 Check the presence of protective films on the charging contacts of new headphones.
- 🧹 Wash the contacts with an alcohol napkin if the headphones have been used before.
- 📱 Make sure that the Bluetooth on your smartphone is activated, but not yet connected to the headphones.
After charging, remove both earbuds from the case at the same time, ideally they should blink quickly and go to standby mode, if this does not happen, it may be a problem in the mechanical contact inside the case or in the oxidation of contacts.
☑️ Checking synchronization readiness
Algorithm of combining left and right earphone
The most important step is to start pairing between the headphones themselves. There are several methods, but the most common for all versions of Redmi AirDots is the use of touch panels. This method does not require finding hidden buttons and works even in the absence of physical access to controls.
Remove both earbuds from the case. Wait until they stop blinking (usually it takes 5-7 seconds) and go into standby mode. Now simultaneously press and hold the touch zones on both earbuds for 5-7 seconds. You need to wait for the indicators to flash quickly in white.
Once you see a fast white flash, release the panels. Now the device is in pair-search mode. Wait about 10-15 seconds without touching the headphones. At which point the left and right channels must find each other. The signal for a successful combination is that one of the headphones (usually the right one) will stop flashing or start flashing very rarely, and the second (left one) can continue to blink or go out, depending on the model.
| Model headphones | Indication before synchronization | Action. | Indication of success |
|---|---|---|---|
| Redmi AirDots Basic | Rare flashing | 5-7 sec retention | One flashes, the other goes out. |
| Redmi AirDots S | Rare flashing | 5-7 sec retention | Fast flashing -> rare |
| Redmi AirDots 2 | Rare flashing | 5-7 sec retention | Right goes out, left blinks |
| Redmi AirDots 3 | Pulse. | 3-5 sec retention | White pulsation on both |
Once the indicators have behaved predictably, open the Bluetooth settings on your phone. You should only see one device called Redmi AirDots (or modification).
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If the headphones keep flashing blue and white alternately after the sensors are held, then they're out of sync. Repeat the procedure by holding the panels for a little longer, up to 10 seconds.
Complete Reset (Hard Reset) procedure
If standard sensor retention doesn't help and the phone still sees two devices or connects to only one, a complete reset is needed, a procedure that clears the internal memory of the headphones of old pairing profiles and returns factory settings.
To start, remove all Redmi AirDots saves from the Bluetooth list on your smartphone. This is a critical step: if the phone tries to automatically connect to the headphones during the reset, the process will stop.
Put the headphones in the case, then remove them. Quickly press 5 times on the touchpad of each earpiece. The exact rhythm is not as important as the number of times you press. After the fifth press, the indicators should flash several times (usually in red or white), which signals a successful reset.
⚠️ Warning: During a series of 5 taps, make sure that the headphones do not return to the case by accident. If they touch the charging contacts, the reset process will stop and you will have to start again.
After a successful reset, place the headphones back in the case for 10 seconds, then retrieve them. Now they're in factory pairing mode. Turn on Bluetooth on your phone and do the search again.
What to do if 5 clicks do not work?
Solving problems with sound desynchronization
Sometimes the phone shows you connecting to both headphones, but the sound comes from only one, or there is a sound, but it is monophonic, which is a sign that the audio protocol has not switched to stereo mode, although the connection is established.
Try playing any audio file, then turning off Bluetooth on your phone completely. Put your headphones in the case, close the lid and wait 10 seconds. Remove them, turn on Bluetooth and wait for the connection. Often this cycle of restarting the network module of the smartphone helps to correctly initiate the stereo protocol.
Another reason could be Bluetooth version conflict: If you have a very old phone and new headphones (or vice versa), you may have codec issues. In Bluetooth settings (Special or Bluetooth Version), try changing your profile if this option is available in your Android shell.
- 📶 Make sure the distance between the phone and the headphones is less than 1 meter when paired.
- 🔄 Reboot your smartphone to clear the cache of Bluetooth services.
- 🎧 Check if the Mono-Audio mode is activated in the special features of Android.
If the sound is interrupted or stuttered, it may indicate interference in the air. Try to move away from sources of strong radiation, such as Wi-Fi routers or microwave ovens, which operate at a frequency of 2.4 GHz, which coincides with Bluetooth.
Features of connecting to different operating systems
The connection process is universal, but there are nuances in the behavior of operating systems. Android devices (especially those with a MIUI shell) often require proof of pairing through a pop-up. On iOS (iPhone, iPad), the process may require re-entering pairing mode, since Apple strictly controls the Bluetooth profile.
iPhone owners should note that once connected, the headphones can appear as Headset and Audio separately. Make sure the audio settings are the correct output. Sometimes resetting the network to the iPhone: Settings → General → Reset → Reset Network settings helps.
On Windows 10/11 computers, there is often a problem when there is sound but the microphone is not working, and this is due to a limitation on the bandwidth of the Bluetooth channel. To solve the problem, you need to find headphones in the Windows Device Manager, go to properties and in the Services section, uncheck the Hands-free box, leaving only Audio.
Linux-based devices may require additional packages, such as blueman or pulseaudio-module-bluetooth, to work properly with AAC or aptX codecs, which use Xiaomi headphones to deliver quality audio.
⚠️ Warning: When connecting to Windows, make sure that Bluetooth drivers are updated.Old drivers often can't handle the stereo stream from today's TWS-headphones, dooming the user to mono-sound.
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The key to success is a sequence of actions: first reset the old settings on the phone, then reset the headphones themselves, and only then a new attempt at pairing.