Modern smartphones of the Xiaomi i Redmi line offer users ample opportunities for working with wireless peripherals, however, the standard connection algorithm does not always guarantee stable results. Often device owners are faced with a situation where the headset is visible in the list, but the connection is not established, or the sound is played with delays and artifacts. The correct one initializing pairing requires an understanding of the specifics of the shell MIUI or a new one HyperOS with audio data transfer protocols.
In this material we will analyze in detail the process of synchronizing accessories with the phone, starting from from basic menu actions to fine-tuning codecs for music lovers. You will learn how to activate the mode Absolute volume, eliminate video and audio desynchronization, as well as what hidden parameters affect the autonomy of your device. Proper system configuration will allow you to unlock the potential of even budget TWS headset models.
Preparing equipment and activating search mode
The first and most critical stage is to correctly switch the headset itself to discovery mode. Many users mistakenly believe that simply turning on the power is enough to start the search, however, most modern models AirDots, Buds or third-party brands require a specific sequence of actions. If the indicator does not flash alternately blue and red (or white), the smartphone simply will not see the device on the air.
On phones Xiaomi you need to make sure that the module Bluetooth is active and in visibility mode for other devices. Go into settings and check to see if airplane mode is accidentally turned on, which is blocking all radios. It's also worth paying attention to the phone's firmware version: outdated software may contain bugs in the wireless communication stack.
⚠️ Attention: If your headphones were previously paired with another phone or tablet, they may automatically try to connect to it when you turn it on. Be sure to turn off Bluetooth on all neighboring devices before setting up a new smartphone.
To put the accessory into (pairing) mode, you usually need to hold down the touch panel or physical button on the case for 5-7 seconds until the LED blinking rhythm changes. In the case of models that have separate cases for each ear, sometimes it is necessary to remove both modules and press the sensors at the same time. Only after the device appears in the list of available ones on the phone screen can you proceed to the next step.
☑️ Ready for pairing
Standard pairing procedure in MIUI and HyperOS
The interface for setting up wireless connections in shells from Xiaomi has undergone a number of changes over the years recent years, but the basic principle has remained the same. The user needs to go to the main settings menu and select the appropriate section. In new versions of the system, the path may look like Settings → Connection and sharing → Bluetooth, while in older builds this is a separate item in the top level of the menu.
After entering the section, the system will automatically start scanning the airwaves. As soon as your model name appears in the “Available Devices” list, click on it to initiate a handshake procedure. At this point, encryption keys are exchanged, ensuring a secure connection. If the pairing request does not appear automatically, try clicking on the gear icon next to the device name.
- 📱 Make sure that the smartphone screen is unlocked during the procedure, as the security system may block requests in sleep mode.
- 🔊 Check that the media volume is not set to zero, otherwise you may think that the connection failed due to the lack of audio signal.
- 🔄 If the error “Failed to pair” occurs, remove the device from the list (by clicking on the gear and selecting “Cancel pairing”) and try again.
Successful connection is confirmed by the appearance of the “Connected” status under the model name, as well as by displaying the headphone battery level in the notification shade or directly in the Bluetooth menu. In the ecosystem Xiaomi for native devices, an animated window often pops up with visualization of the case and the charge percentage of each ear separately.
Advanced settings for audio codecs and transmission quality
For users seeking maximum sound quality, standard settings may not be enough. Android engineering has a built-in ability to select audio stream compression codecs, which directly affects the detail of the sound and the delay when watching video. On devices Xiaomi these options are often hidden in the developer menu, which must be activated manually.
To access the technical parameters, go to Settings → About phone and quickly tap the "MIUI Version" (or "OS Version") field 7-10 times until the "You are now a developer" notification appears. After this, a new item will appear in the additional settings menu For developers. This is where the tools for fine-tuning the Bluetooth stack are hidden.
| Codec | Bitrate (approximate) | Purpose |
|---|---|---|
| SBC | 328 kbit/s | Basic standard, maximum compatibility |
| AAC | 256 kbit/s | Optimal for Apple devices and most Android |
| aptX | 352 kbit/s | High quality for Qualcomm chips |
| LDAC | 990 kbps | Hi-Res audio, maximum detail |
In the developer menu, find the “Bluetooth Audio Codec” section and select the most advanced option supported by your headset. If your headphones support LDAC or aptX HD, choosing these codecs will allow you to transmit almost lossless sound. However, it is worth remembering that high bitrates require a more stable radio channel and consume battery power faster.
If after changing the codec the sound begins to be interrupted, return to AAC or SBC. This may mean that there is too much interference in the airwaves at your location for high-speed data transmission.
Eliminating audio and video desynchronization
One of the most common complaints from users of wireless headsets is the delay of the audio track relative to the video sequence. This problem is especially noticeable when watching movies on YouTube or playing fast-paced shooters. In the system Android based Xiaomi there are software methods for minimizing this lag, although it is difficult to completely eliminate it at the level of radio channel physics.
In the same menu “For Developers” there is an option “Disable absolute volume”. Try changing the state of this switch: if it was on, turn it off, and vice versa. This setting changes the way volume is controlled: either the smartphone controls the gain directly, or passes the command to the amplifier inside the headphones. Incorrect configuration here often causes not only delays, but also quiet sound even at maximum volume.
⚠️ Attention: The Absolute Volume feature may not work correctly with some third-party models. If, after changing the setting, the volume begins to be adjusted jerkily or disappears completely, return the switch to its original position.
It is also worth checking the settings of a specific video player or game. Many modern applications have their own audio engine with Bluetooth latency compensation options. Activating such a function in the player settings often gives a more noticeable effect than global changes in the phone system. For games, choosing a codec with low response time is critical, for example aptX Low Latencyif the equipment supports it.
Optimizing power consumption and connection stability
Aggressive energy saving system MIUI is known for being able to forcefully close background processes, which sometimes negatively affects the stability of Bluetooth services. If the connection constantly breaks down when locking the screen or switching between applications, you need to make changes to the battery settings for the corresponding system services.
Go to the section Settings → Applications → All applications and find “Bluetooth” or “Sharing” in the list (depending on the firmware version). In the access rights menu, select “Activity Control” and set the value to “No restrictions.” This will prevent the system from “putting to sleep” the communication module when the phone is in your pocket or on the table.
- 🔋 Disable the “Smart Wi-Fi switching” option if it conflicts with the Bluetooth frequency (both operate in the 2.4 Hz range).
- 📶 Avoid carrying the phone in your trouser pocket along with keys or coins; the metal screen can shield the antenna signal.
- 🧹 Regularly clear the Bluetooth cache through the app data storage menu if strange glitches are observed after updating the system.
Additionally, check whether the mode is activated energy saving in the notification shade. In this mode, the system limits background activity and processor frequency, which can lead to micro-discontinuities in the audio data stream. To listen to music in high quality, it is recommended to use the “Balanced” or “Performance” mode.
Why do headphones fall off?
A frequent cause of disconnections is not the phone itself, but air overload. If you are in a subway, airport, or office with hundreds of Wi-Fi routers, the Bluetooth signal may be jammed by interference. Try switching Wi-Fi to the 5 GHz frequency to free up the 2.4 GHz band for the headset.
Resetting settings and solving critical errors
If none of the above methods helped, and the headset behaves inappropriately, you should resort to drastic measures. Often the problem lies not in the phone, but in the frozen state of the memory of the headphones themselves. Resetting the accessory to factory settings solves 90% of problems with the invisibility or one-sided operation of the speaker.
The reset procedure is individual for each model, but the universal method for most TWS headphones looks like this: place both ears in the case, open the lid and hold down the settings button on the back panel (or the sensors on the headphones themselves) for 15-20 seconds until the color of the indicator changes. After this, remove the device from the list of paired ones on your phone and perform the connection procedure again, as with the first purchase.
As a last resort, you can reset the network settings on the smartphone itself Xiaomi. This action will delete all saved Wi-Fi networks and Bluetooth pairs, but will return the radio modules to their original state. Path to function: Settings → Connection and sharing → Reset Wi-Fi, mobile data and Bluetooth. This helps if a critical amount of driver errors have accumulated in the system registry.
Full reset of the headphones to factory settings is the most effective way to solve problems with desynchronization of the left and right channels or failure of one of the speakers.
Why does the phone see the headphones, but does not connect?
Most often this happens because the headset is already connected to another device nearby and intercepts the connection. The second reason is the full pairing memory on the headphones themselves; in this case, completely resetting them using the button on the case helps.
How to improve the volume on Xiaomi if it is too quiet?
Try disabling “Absolute volume” in the developer menu. Also check the sound settings in the Security application → Sound Boost (if available in your region), or use third-party equalizers with a preamp function.
Is it possible to connect two pairs of headphones to one Xiaomi?
Yes, modern Xiaomi models support the Dual Audio function. In the Bluetooth menu, click on the three dots or gear and select “Connect a second device.” Please note that this may increase the load on the phone's battery.
What to do if only one earbud is working?
This is a classic sign of a stereo pair being out of sync. Place both headphones in the case, hold down the reset buttons until the indicator blinks, remove the device from the phone and pair again. This usually restores the connection between the left and right channels.
Does the case on the phone affect the quality of the connection?
Yes, cases with metal inserts, magnetic rings for car holders or a very thick layer of rubber can shield the Bluetooth antenna located at the top or bottom of the smartphone. Try removing the case to check the stability of the signal.