Modern smartphones Xiaomi Redmi line equipped with powerful Bluetooth modules that allow you to instantly transfer high-quality audio to external devices. However, the process of initial pairing can cause difficulties for users who are accustomed to automatic systems of other brands or faced with the features of the shell MIUI and HyperOS. Proper configuration of the communication channel is critical not only for listening to music, but also for the stable operation of the microphone during calls and games.
In this article, we will take a look at the algorithm that will help you connect your gadgets in seconds, learn about the nuances of detection mode, how to manage codecs and how to fix common errors when your phone can’t see the headset.
Preparation of headphones for the pairing mode
The first and most important step is to put the accessories in visibility mode, and many users make the mistake of simply turning on the power, whereas the first connection requires activating a special search mode, and without this step, the Bluetooth module of the smartphone will not be able to detect the external device in the air.
For most models, including popular AirDots, Redmi Buds and third-party brands like JBL or Sony, the procedure looks similar. Usually you need to pinch the touchpad or physical button on the case case (or on the headphones themselves if the case does not have a button) for 3-5 seconds.
⚠️ Warning: If the light flashes slowly or is on a straight light, the pairing mode is not activated. Continue holding the button until the flashing begins.
In the case of True Wireless Stereo (TWS), models sometimes require resetting previous settings, often using a “double reset” method: place the headphones in the case, open the lid and press the buttons for 10-15 seconds before changing the color of the indicator, which ensures that the device will not try to connect to another phone that was connected previously.
Why don't the headphones go into mode?
Search and Connect through Xiaomi Settings
After the peripherals are ready, we move on to the smartphone settings. MIUI may vary slightly depending on the Android version, but the logic remains the same: you need to open the system menu and activate the wireless module.
Follow the step-by-step instructions:
- 📱 Unlock the screen and go to the Settings app.
- 🔗 Select Bluetooth (or find it through a search at the top of the settings bar).
- 🔘 Make sure the activation slider is in the On position.
- 🔍 Click on Device Search or wait for automatic scanning.
The "Available Devices" list should show the name of your headset. Note that sometimes the devices can be displayed twice: one with the model name, the other with the model name. MAC-address"_LE". Choose your primary name.
☑️ Algorithm of successful connection
When you click on the device name, the system can request confirmation of pairing. PIN-The standard combinations for most devices are 0000 or 1234, and when you successfully connect, you'll see "Connected" and a headphone battery icon.
Use the Fast Pair function and pop-up windows
Xiaomi’s ecosystem offers an improved connectivity protocol for its own accessories and some certified models.Fast Pair technology allows you to open the settings menu immediately when you open the case lid next to the unlocked phone.
If you have the original Redmi Buds or Mi True Wireless Earbuds, when you open the case, an animated window should appear on the smartphone screen with the image of the headphones and their charge level. It's not just a beautiful picture, but a full-fledged control interface.
To activate this function, make sure that the following conditions are met:
- 📶 Bluetooth and geolocation enabled (required for detection protocol to work).
- 🔓 The smartphone screen is unlocked and is on the desktop.
- 🎧 Headphones have not previously been paired with this device or dropped.
- 🆙 Version. MIUI Updated to current (minimum) MIUI 12 and above).
💡
If a pop-up doesn’t appear, try clearing the “Bluetooth” app cache in the “Applications → All Apps → Show System → Bluetooth → Memory → Clear Cache” section.
This window not only allows you to confirm your connection, but also assigns dual-touch features, check the headphone firmware version, and find low latency mode for games, making it much easier to set up the initial setup compared to the standard Android menu.
Customization of sound quality and codecs
After a successful connection, it is important to make sure that the sound is transmitted in the best possible quality. Xiaomi smartphones support various audio codecs such as SBC, AAC, aptX and LDAC. Choosing the right codec affects bitrate and audio delay.
To check and change the settings:
- Go to Settings → Bluetooth.
- Click on the arrow or gear next to the name of the connected headphones.
- Find the Bluetooth Codec (can be hidden in the developer menu).
If you use high-end headphones, such as those with LDAC or aptX HD support, choosing the appropriate codec in the phone menu will let you hear the details that are lost with standard SBC compression.
| Codec | Bitrate (kbit/s) | Delay. | Recommendation |
|---|---|---|---|
| SBC | 328 | Tall. | Basic quality, compatible with all |
| AAC | 256 | Medium | Optimal for iOS and Android (balance) |
| aptX | 352 | Low. | For high-resolution music on Android |
| LDAC | 990 | Medium | Highest quality (Hi-Res Audio) |
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Low latency is critical for gaming: Enable Game Mode in Bluetooth settings or use aptX Low Latency codecs if supported by your headphone model.
Solving Connectivity and Stability Issues
It is not uncommon for users to experience a situation where Xiaomi’s phone stops seeing headphones or the connection is constantly breaking, which can be caused by a software glitch in the Bluetooth stack or a profile conflict.
One effective method is to clear the list of conjugated devices. Go to Bluetooth settings, click on the information icon next to the problem device, and select Disable or Forget the device.
It's also worth checking if the cache is full of system services, and sometimes the accumulated errors interfere with the normal operation of the communication module.
- 🗑️ Open the Settings. → Annexes.
- 👁️ Turn on system processes display (three dots in the corner) → Show system-based).
- 🔍 Find in the list of Bluetooth and Bluetooth MIDI Service.
- 🧹 Press Memory. → Clear (not to be confused with "Clean all data" if you do not want to reset all network settings).
If the problem persists, try resetting your network settings, which will return your Wi-Fi, mobile internet, and Bluetooth settings to factory values, but will not delete your personal files.
Advanced settings through the engineering menu
For advanced users who want to make the most of an audio track, an engineering menu is available, which allows you to fine-tune the Bluetooth module parameters, including transmitter power and profile versions.
To enter the test menu, enter a special code in the Phone app. For most Xiaomi devices, this is:
##6484##Or alternatively:
##3646633##In the open menu Hardware Testing go to the tab Connectivity → BT. Here you can check the status of the module, run tests for data transmission (Loopback test) and see the real signal power in dBm. Be careful: changing unknown parameters can lead to unstable communication.
⚠️ Warning: Do not change the values in the engineering menu unless you are sure of their purpose.Incorrect frequency or power settings can make the Bluetooth module inoperable before flashing.
This section is only justified if standard methods fail to eliminate noise interference or rattling, and in 95% of cases, standard retuning or resetting is sufficient.