You take out your favorite wireless headphones, you try to connect them to the Xiaomi Redmi Note 12 or POCO X5 Pro, but the device stubbornly ignores pairing requests — a familiar situation? The problem with Bluetooth connectivity on Xiaomi smartphones is more common than it seems. The reasons can be rooted in both a banal software failure and hardware malfunctions of the communication module. In this article, we will examine all possible scenarios why the headphones stopped connecting, from MIUI errors to Bluetooth 5.2/5.3 protocol conflicts.
Xiaomi is very much optimizing power consumption, sometimes at the expense of connection stability. For example, MIUI 14+ has the default "Adaptive Bluetooth" feature, which automatically turns off the module to save charge if it doesn't find active devices within a 5+ meter radius. But that's just one of the reasons. Next, system analysis with step-by-step solutions for each situation.
1. Check basic Bluetooth settings on Xiaomi
Before you start to commit hardware failure, make sure that the problem is not the basic settings, and let's start by checking the visibility of the device and the pairing mode.
Open Settings → Bluetooth and pay attention to the following settings:
- 🔍 Visibility of the device: Make sure that the “Visibility for all devices” slider is active (in the case of the device). MIUI 13+ It's hidden under the "Additional" button").
- 🔄 Pairing mode: Headphones should be in search mode (usually press the power button on the headphones). 5-7 seconds before flashing the indicator).
- 📱 List of associated devices: If the headphones have been connected before, remove them from the list and try to re-connect them.
An important nuance: in the Xiaomi 12/13 series and flagships with Snapdragon 8 Gen 1/2, there is a bug in which the Bluetooth module “falls asleep” after 10 minutes of inactivity. To wake it up, it is enough to turn on and off the aircraft mode (Settings → Mode in the plane).
⚠️ Note: If your headphones are listed in the device list but the connection is not happening, this may indicate a conflict of Bluetooth profiles (for example, a Bluetooth profile, A2DP for sound HFP The solution is to reset the network settings (more on this below).
📊 What kind of Xiaomi model do you have?
Redmi Note 10/11/12
POCO X3/X4/X5
Mi 11/12/13
Another model
2 MIUI failures: how to reset Bluetooth settings
The MIUI shell is known for its features, which sometimes work against the user. One of them is the automatic control of Bluetooth connections through the Battery function and performance → Adaptive Bluetooth. If the headphones connect, but the sound is interrupted or the connection breaks after 30-60 seconds, this is the culprit.
To reset Bluetooth settings to factory:
- Go to Settings → Applications → Application Management.
- Click on the three dots in the upper right corner and select Show all processes.
- Find Bluetooth (or com.android.bluetooth), open its settings.
- Click Warehouse → Clear the data and Clear the cache.
- Reboot the phone.
After you restart, try reconnecting your headphones. If the problem persists, move on to the next step, reset the network settings.
3. Firmware conflicts: update or rollback of MIUI
V MIUI 14.0.3 And earlier versions were critical bug with Qualcomm drivers WCN6750 (chip Bluetooth/Wi-Fi in most Xiaomi, which is why the Bluetooth devices 5.2 Could not work consistently with headphones on Bluetooth 5.0. This was manifested in an infinite “connection...” without result.
Decisions:
- 📲 Update the firmware: Go to Settings → The phone. → Update MIUI. If you have a version that is newer than 14.0.4, install it.
- 🔙 Backtrack to stable version: If the bug appears after the update, try returning to the previous firmware via Fastboot (instruction below).
- 🛠️ Manual install of drivers: For advanced users, flash vendor.boot separately with corrected drivers (requires an unlocked bootloader).
To roll back firmware through Fastboot:
fastboot flash boot boot.img
fastboot flash vendor_boot vendor_boot.img
fastboot reboot
⚠️ Attention: Firmware rollback erases all data from the device. Pre-backup through Settings → Additionally. → Backup and reset. Don't use this method on devices with a locked bootloader, it will lead to a "brick".
How to check the version of the Bluetooth module?
Open the app. CID Info (available in Play Market) and find the Bluetooth Chip bar. WCN6750/WCN6855 topical issues LDAC/aptX codecs.—> 4. Hardware problems: diagnostics of Bluetooth module If software methods do not help, a physical malfunction of the Bluetooth module is possible: 💧 Falling into water or exposed to high humidity. 🔥 Overheated (for example, during charging or playing). 🛠️ Disassembled for repair (Bluetooth antenna damage). Run a quick diagnosis: Connect other Bluetooth devices (column, fitness bracelet, keyboard) If none of them work, the problem is in the module. Check Wi-Fi: 90% Bluetooth and Wi-Fi use a single chip (e.g. Qualcomm) WCN6855). If Wi-Fi is also glitching, the chip is faulty. Run a hardware test through ##4636## (in the "Phone Information" menu, find "Bluetooth" Symptoms Likely cause Solution Headphones are connected, but the sound is interrupted Damage to Bluetooth antenna Replacement antenna module (~1500₽) Bluetooth does not turn on at all WCNxxxx chip failure Replacement of motherboard Distance-only connection <1 m Chip oxidation Chip cleaning / soldering chip If the diagnosis confirmed a hardware breakdown, contact the service center. Average cost of repair: Replacement of Bluetooth antenna: 1200–2500₽. Chip soldering: 3000–6000₽. Replacement of the motherboard: from 8000₽. 5. Conflicts with other devices and Bluetooth interference run on frequency 2.4 GHz, which is overloaded with other devices: routers, microwaves, wireless mice. If the headphones are connected, but the connection is unstable, radio interference may be to blame. How to check and eliminate: 📡 Change Wi-Fi Channel: Select Channel 1, 6, or 11 (least loaded) in your router settings). 🔌 Disable other Bluetooth devices: Fitness bracelets, keyboards, speakers can create conflicts. 📱 Check the energy saving settings: C Settings → Battery → Set the mode to "Performance." For advanced users, use the WiFi Analyzer (Android) app to scan the air for load. If there are more than 5 active Wi-Fi networks in a radius of 10 meters, the problem is precisely the interference. 💡If headphones are connected in a stable way on the street, but they are "glutching" at home, radio interference is to blame. Solution: switch the router to 5 GHz or use headphones with Bluetooth 5.2 support+ (6. Headphone problems: diagnosis and reset In 30% of cases, the problem lies not in the phone, but in the headphones themselves. This is especially true for models with active noise reduction (ANC), where additional sensors may conflict with Xiaomi protocols: 🔋 Charging: Make sure the headphones are charged at least on 20%. Some models (e.g. Xiaomi AirDots Pro) 2) Refuse to connect at low charge. 🔄 Resetting headphones: For most models – press the power button on 15 seconds before double flashing of the indicator. 📱 Compatibility check: Headphones with Bluetooth 5.0 It can work unstable with Bluetooth phones 5.2/5.3 due to different protocols (LE Audio vs Classic Audio. If you have Xiaomi headphones, use Mi Earphones' proprietary diagnostics app. It shows: Charge level of each headphone. Firmware version (relevant to AirDots). 3 Pro, Buds 4 Connection status (e.g. error) 0x12 — codec conflict). 7. Alternative ways to connect If standard Bluetooth connection doesn’t work, try alternative methods: 1. Developer Mode + Forced Bluetooth Enablement: Activate Developer Mode: Settings → The phone. → Version. MIUI (press 7 times. Go back to Settings. → Additionally. → For developers. Find Bluetooth Debugging and Always turn Bluetooth on when scanning - turn on both options. 2. Using third-party applications: Bluetooth Auto Connect automatically restores the connection. SoundAssistant allows you to manually select Bluetooth codecs (SBC, AAC, 3. Dual Bluetooth connection (for Xiaomi with a MIUI 12+): Some models (e.g. Xiaomi) 11T Pro) support simultaneous connection to two devices. Try: Connect your headphones to another phone/PC. Go back to Xiaomi and try to connect again. 💡If the headphones connect to other devices but not to Xiaomi, the problem is the phone. If they don't connect to anything, the headphones or their firmware are to blame. FAQ: Frequent questions about Bluetooth on Xiaomi ❓ Why Xiaomi can't see headphones even though they're in pairing mode? Causes: Headphones use Bluetooth Low Energy (BLE), Solution: Turn off Battery Optimization for Bluetooth in Settings → Battery → Application selection. Conflict MAC-Addresses (if the headphones previously connected to another Xiaomi) Solution: reset network settings (Settings) → SIM-maps and networks → Resetting Wi-Fi, Mobile Network and Bluetooth). ❓ How do I know which Bluetooth codec my headphones are using? Install the Bluetooth Codec Changer app (root required) or check in Settings → Sound. → Bluetooth sound quality (available in the MIUI 14+). Optimal codecs for Xiaomi: AAC — Balance of quality and stability. aptX Adaptive is the best quality, but only works with Qualcomm headphones. LDAC — High quality, but can be lagged on weak processors (e.g. Snapdragon) 6xx). ❓ Can I connect headphones to Xiaomi through USB-C? Yeah, if the headphones have a regimen. USB Audio (e.g. Sony) WH-1000XM5 or QC45). For this: Connect the headphones to the phone via cable USB-C → USB-C. In the sound settings, select the source USB-Audio. Limitations: The microphone will not work (sound only) No charge during listening. ❓ Why After Updating MIUI Did the headphones stop working? Probable reasons: Update reset Bluetooth settings MAC-Addresses (solution: remove the headphones from the list of devices and connect again). New version MIUI Blocks uncertified Bluetooth devices (relevant to Chinese AirPod clones) Solution: roll back the firmware or get root editing rights vendor/build.prop. Google Play Services conflict (renew them manually via Play Market). ❓ How to check if a Bluetooth module works on Xiaomi? Diagnostic methods: Test mode: Dial ##232338## → Select Bluetooth Test. Bluetooth Logs: Install Logcat Reader and filter entries by tag bt. ADB: adb shell dumpsys bluetooth_manager Look for the lines of state=ON and discover=TRUE. If you see errors in the logs ERROR: bta_dm_sm_execute Failed to start discovery – problem in drivers (reflashing required).