Why Bluetooth headphones do not connect to Xiaomi phone: a full analysis of problems and solutions

Wireless headphones have become an integral part of everyday life, but connecting to Xiaomi smartphones sometimes turns into a real puzzle: you try to connect devices, and in response, silence, the error “failed to connect” or endless “Device Search”, the situation is complicated by the fact that problems can be hidden in both the settings of the phone and the firmware of the headphones, and sometimes external interference, which users do not even know.

In this article, we’ll break down all the possible reasons why Bluetooth headphones (including Redmi Buds, Mi True Wireless models, POCO Pop and third-party brands refuse to connect to Xiaomi phones (Redmi Note series, POCO, Mi 11/12/13 You will receive step-by-step instructions with illustrations, a compatibility table, and diagnostic tips, from basic checks to deep technical nuances. MIUI 12/13/14 HyperOS, which is often a source of conflict.

⚠️ Note: If your Xiaomi phone is released before 2018 years (e.g. Redmi) 4X or Mi A1), Some solutions may not work due to an outdated Bluetooth module (version) 4.1-4.2). In this case, we recommend updating the firmware or using a Bluetooth adapter. 5.0.

Basic checks: what to do first

Before you dive into complex settings, make sure that the problem is not on the surface. In 60% of cases, connection problems are solved by simple actions that users overlook.

Start by rebooting both devices: turn off the headphones (if there is a power button) and reboot the Xiaomi phone. This will reset temporary errors in the Bluetooth stack.

• 🔋 Headphone charge: Headphones that are discharged may not signal availability. 10-15 minutes and try again.
• 📱 Flight mode: Make sure the phone is turned off "In the plane" (Settings) → Connections → Flight mode. It locks all wireless modules, including Bluetooth.
• 🔍 Headphone Visibility: Many models (e.g. Redmi Buds) 3 Pro) require manual pairing. Hold the power button to do this. 5-7 seconds before flashing the indicator.
• 📡 Distance and interference: There should be no obstacles (walls, metal surfaces) or interference sources (microwaves, 2.4 GHz Wi-Fi routers) between the phone and the headphones).

If you've previously connected to this phone, remove it from the list of associated devices and try reconnecting it.

1. Go to Settings → Bluetooth.
2. Find the name of your headphones in the list and tap the icon ⚙️ (gear).
3. Select “Forget the device” (Unpair).
4. Turn on the pairing mode on the headphones and reconnect.

2. Firmware problems MIUI/HyperOS: bug-bug

Xiaomi smartphones are known for their proprietary MIUI interface (and the new HyperOS), which sometimes conflicts with Bluetooth devices, especially for MIUI 12.5-14 firmware, where the following bugs occur:

• 🐞 Bluetooth cache error: Accumulated connection data can block new pairings.Solution - clearing module cache.
• 🔄 Fast Pair: Fast Pair (in the case of a fast connection) MIUI 13+) Sometimes "forgetting" devices.
• 📵 Lack of codec support: Headphones with aptX codec or LDAC It may not work on Xiaomi’s budget models (e.g. Redmi). 9A).

To correct firmware errors:

1. Clear the Bluetooth cache: Settings → Annexes → Application management → Three points (⋮) → Show system-based → Bluetooth → Warehouse → Clear the cache
2. Turn off Fast Pair: Settings → Connections → Bluetooth → Additional settings → Quick device connection (disable)
3. Reset network settings: This will bring all network settings back to factory settings, including Bluetooth: Settings → About Phone → Settings Reset → Resetting Wi-Fi, mobile network and Bluetooth settings

⚠️ Warning: If the headphones still don't connect after resetting, check the version MIUI. On Xiaomi forums, bugs of specific builds are often discussed (for example, MIUI 14.0.3 for Redmi Note 11 had a critical bug with Bluetooth 5.2.Update firmware via Settings → The phone. → Updating the system.

Clear the cache of the Bluetooth module|Turn off Fast Pair|Check the version. MIUI|Reset network settings|Update firmware-->

3. Incompatibility of headphones and phone: compatibility table

Not all wireless headphones work equally well with Xiaomi phones, and problems often arise from:

• Different versions of Bluetooth (e.g. 5.3 headphones + 4.2).
• Unsupported audio codecs (aptX Adaptive, LC3)
• Manufacturer restrictions (e.g. AirPods optimized for iPhone)

The table below shows the compatibility of popular headphone models with Xiaomi phones (relevant to MIUI 14/HyperOS):

If your headphone model is marked as «❌ "No" or «⚠️ Partial, try it:

1. Use third-party software to force you to connect (e.g. Bluetooth Auto Connect).

4. Failures in the Bluetooth module of the phone

If the headphones are not connected to any device, the problem may lie in the hardware of the phone.

• The phone does not find any device (including other smartphones, speakers).
• Bluetooth is turned on, but immediately shut down.
• In the settings, a message appears “Bluetooth error”.

For diagnosis:

1. Check the module through the engineering menu: ##4636## → Device Information → Bluetooth If OFF or Unavailable status – the module is defective.

⚠️ Attention: On Xiaomi phones with Snapdragon 6xx/7xx (for example, POCO X3 Pro) there is sometimes a chip defect WCN3990, chargeable Wi-Fi/Bluetooth. If resetting the settings did not help, contact the service center - you may need to solder the chip.

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If Bluetooth is not working properly (communication breaks), try to turn off Wi-Fi while you're connected. Both modules use 2.4 GHz, which can cause interference.

5. Conflicts with other applications and services

Applications that run in the background can block Bluetooth connections, most often to blame:

• 🎵 Music players: Spotify, YouTube Music sometimes take control of audio devices.
• 🔒 Avast, 360 Security can block pairing as “suspicious activity».
• 📊 Optimizers: MIUI Optimization, Greenify suspend Bluetooth services.

To resolve conflicts:

1. Close all background applications through Recent → Close everything.
2. Turn off battery optimization for Bluetooth: Settings → Battery → Battery Optimization → All apps → Bluetooth (disable optimization)
3. Check permissions for applications: Settings → Applications → Permissions → Bluetooth (issue permissions to the desired programs)

Critical information: On Xiaomi phones with MIUI 13+, the built-in Security app can block headphones from connecting because of an “untrusted device.” To fix this, go to Security → Devices → Trusted Devices and manually add your headphones to the list.

6. Hardware malfunctions of headphones

If all the previous steps didn't work, the problem could be the headphones themselves.

• 🔋 Bloated battery: Leads to one of the headphones shut down (often found in Redmi Buds 2 after a year of use).
• 📡 Damaged antenna: Headphones are connected but the sound is interrupted or absent.
• 💧 Oxidation of contacts: After moisture is ingested (even if the headphones are positioned as waterproof).

For diagnosis:

1. Try connecting the headphones to another device (laptop, tablet).
2. Check if the lights on both headphones are on when you turn on.
3. Listen to if there is any crack or noise interference (this is a sign of damage to the speaker).

If headphones are guaranteed, contact the service center. For self-repair (at your own risk) you can:

• Disassemble the case and check the integrity of the wires (relevant for TWS-earphones).
• Clean the contacts of the charging case with alcohol (for models with pogo-pin).

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If one of the headphones is not working, but the indicator is on, the problem is in the speaker or the plume. If the indicator is not on, the board or the battery is faulty.

7. Alternative ways of connecting

If standard pairing doesn’t work, try circumventing the restrictions by:

• 🔌 USB Bluetooth adapter: Connect to the phone external Bluetooth adapter 5.0 via OTG. This is true for older Xiaomi models (e.g. Redmi 5 Plus).
• 📱 Developer Mode: Enable Bluetooth Debugging (instruction above) and use ADB Forwarding the adb shell am start -a android.bluetooth.devicepicker.action.LAUNCH
• 🎧 Third-party apps: Bluetooth Auto Connect or BassBooster sometimes help get around restrictions MIUI.

For Xiaomi models with HyperOS (2026), there is another way – resetting the Bluetooth stack via Fastboot:

1. Install the Mi Flash Tool and ADB drivers.
2. Connect your phone to your PC in Fastboot mode (clip Volume Down + Power).
3. Run the command: fastboot erase modemst1 fastboot erase modemst2
4. Reboot the phone.

⚠️ Note: Fastboot commands will reset all network settings, including IMEI. Use this method only if other methods have not worked and you are confident in your actions.

FAQ: Frequent questions about connecting Bluetooth headphones to Xiaomi