How to clean up the Bluetooth cache on Xiaomi smartphones: 5 working ways

Bluetooth connectivity issues on Xiaomi, Redmi and POCO smartphones are one of the most common complaints users have: headphones don't connect, the speaker constantly falls off, and the car radio can't see the phone? 80% of cases are due to clogged or damaged Bluetooth cache. This temporary buffer stores data about the paired devices, but over time accumulates errors, especially after MIUI updates or firmware changes.

Many users mistakenly think that it is enough to simply reboot the phone or remove the device from the list of conjugates. In practice, this helps only 30% of the time. Cleaning the Bluetooth cache is a more in-depth procedure that requires access to system settings or even engineering menus. In this article, we will discuss all the current methods for different versions of MIUI (including MIUI 14 and HyperOS), and also explain how to avoid typical cleaning errors.

If you are faced with the fact that Bluetooth on Xiaomi does not find the device, connects with a delay or refuses to work at all, do not rush to carry the phone to the service. In most cases, the problem is solved software. The main thing is to correctly identify the source of the problem and apply the appropriate cleaning method.

Why you should clean up your Bluetooth cache on Xiaomi

Bluetooth cache is a temporary file that stores information about connected devices: their names, MAC-addresses, connection profiles (e.g, A2DP for sound HFP For hands-free, and even for the most recent sessions, over time, this cache can be used to create a new system:

• 🔹 Damage – due to malfunctioning of the Bluetooth module or improper disconnection of devices.
• 🔹 Overflow – if you often connect different gadgets (earphones, fitness bracelets, car systems).
• 🔹 Conflict – after updating MIUI or the firmware of the Bluetooth module.

Typical symptoms of clogged cache:

• 🎧 Headphones are connected, but the sound is interrupted or delayed.
• 🚗 The radio recorder does not recognize the phone, although it used to work stably.
• 🔄 The device is then connected, then disconnected for no apparent reason.
• 🔍 The list of available devices displays “ghosts” – gadgets that have not been used for a long time.

Cache cleaning helps to reset all the time data and force the Bluetooth module to recreate connections from scratch, this is especially true for Xiaomi models with Qualcomm modules (for example, Redmi Note 12 Pro+ or POCO F5), where problems with Bluetooth are more common due to the features of the firmware.

Method 1: Clear cache through Bluetooth application settings

The simplest and most secure method that works on all Xiaomi smartphones running MIUI 12-14 and HyperOS. It does not require superuser rights and is suitable for beginners.

Instructions:

1. Open the Settings → Applications.
2. Click on the three dots in the upper right corner and select Show All Apps (or System Apps in newer versions).
3. Find the Bluetooth list (sometimes called Bluetooth Share or Bluetooth MIDI Service).
4. Open the application page and select Storage.
5. Click Clear Cache (not to be confused with Clear Data – it will remove all associated devices!).
6. Reboot the phone.

After you restart, try reconnecting the problem device, and if it doesn't work, move on to the next method.

Method 2: Reset Bluetooth settings via engineering menu

If standard cache cleaning doesn’t work, you can use the MTK Engineer Mode or Qualcomm Service Mode, a deeper method that resets all Bluetooth settings, including hidden settings.

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Attention: Incorrect actions in the engineering menu can disrupt other wireless modules (Wi-Fi, GPS).

For smartphones on Qualcomm processors (most flagships and mid-budget models of Xiaomi):

1. Open the phone app and enter the code: ##4636##
2. In the menu that opens, select Phone Information (or Phone Information).
3. Scroll down to the Bluetooth block and press the Run Bluetooth Test.
4. In the new window, select Reset Bluetooth or Clear BT Config.
5. Confirm the reset and restart the phone.

For MediaTek processor devices (e.g. Redmi 9A, POCO C31):

1. Enter the code ##36446337## (Engineer Mode opens).
2. Go to the Connectivity section → Bluetooth.
3. Select Reset Bluetooth Stack.
4. Confirm the action and wait for the module to restart.

Method 3: Manually delete cache files (for advanced ones)

This method requires access to the phone's file system and is suitable for users who are not afraid to work with system folders, and is recommended only for experienced users, as careless actions can lead to malfunctions in the phone.

Instructions:

1. Install any file manager with access to root folders (such as Solid Explorer or FX File Explorer).
2. Give the application superuser rights (if you have root) or use the built-in MIUI Explorer with the option to Show Hidden Files enabled.
3. Go to /data/misc/bluedroid/
4. Delete all files with the.cfg and.bin extensions, for example: bt_config.conf bt_stack.conf bt_vendor.conf

Reboot the phone.

Once you restart, the Bluetooth module will create new configuration files, and all the connected devices will be removed and reconnected.

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If you don’t have root rights but need to clean the cache manually, try using ADB (method 4).This is safer than getting root, and doesn’t require unlocking the bootloader.

Method 4: Cleaning the cache through ADB (without root)

Android Debug Bridge (ADB) is a debugging tool that allows you to execute system commands without superuser rights.The method is suitable for all Xiaomi models, including those that block access to the engineering menu.

What you need:

• 🖥️ A computer with installed Xiaomi drivers and ADB Tools.
• 📱 Included debugging by USB on the phone (Settings) → The phone. → Version. MIUI → 7 times press to unlock the developer mode, then turn on Debugging USB in Additional settings).
• 🔌 USB-cable (preferably original).

Step-by-step:

1. Connect the phone to your computer and confirm the debugging permission.
2. Open the command prompt (Windows) or terminal (macOS/Linux) in the folder with ADB.
3. Enter the commands in turn: adb shell pm clear com.android.bluetooth rm -rf /data/misc/bluedroid/* reboot
4. Wait for the phone to restart.

If Bluetooth stopped working after you've completed the commands, don't panic. Reboot your phone again, and the system will automatically restore the files you need.

Method 5: Complete network reset (last resort)

If none of the previous methods worked, it would leave you resetting all your network settings, which would not only delete the Bluetooth cache, but also the stored Wi-Fi networks, mobile Internet data and the data. VPN-Use this method only as a last resort.

Instructions:

1. Open Settings → Network and Internet (or Connections and Sharing in newer versions of MIUI).
2. Select Network Reset or Wi-Fi, Mobile Network, and Bluetooth Reset.
3. Confirm the action (you may need to enter a pattern lock or password).
4. After restarting, reset your Bluetooth devices.

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Note: On some Xiaomi models (such as the Redmi Note 10 Pro or Mi 11), network resets may also reset NFC and Geolocation settings. Before the procedure, check if bank cards or transport applications are tied to the phone.

Table: Comparison of Bluetooth Cache Cleaning Methods

Important: On Xiaomi smartphones with Qualcomm Snapdragon 8 Gen 2 processors (such as Xiaomi 13 Ultra or Redmi K60 Pro) after clearing the Bluetooth cache, you may need to additionally adjust the audio codecs (AAC, aptX). If the sound is distorted after connecting the headphones, go to Bluetooth Settings → Additional → Sound Quality and select the codec manually.

Frequent Mistakes and How to Avoid Them

Many users make the same mistakes when clearing the Bluetooth cache, which leads to new problems.

• 🚫 Delete files from the folder /system — It could lead to a system crash. /data/misc/bluedroid/.
• 🚫 Use Google Play cleaners apps – they often delete important system files and can disrupt the module.
• 🚫 Resetting to factory settings is an extreme measure that will remove all data from the phone.
• 🚫 Interrupt the cleaning process – if you run ADB-commands or resets through the engineering menu, wait until the end (even if the phone is rebooted for a long time).

If there are problems with Bluetooth after cleaning the cache, check:

• 🔋 Phone Charge Level – If the power level is below 15%, the Bluetooth module may not work smoothly.
• 📱 Version MIUI — on MIUI 14 and HyperOS have Bluetooth bugs in beta. Update firmware to stable build.
• 🔄 Device compatibility – Some headphones (such as AirPods) require special profiles that may not be supported on custom firmware.

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If none of the methods worked, the problem may be in the hardware (the Bluetooth module is damaged), in which case contact the service center. On Xiaomi warranty phones, repair or replacement of the module is free.

FAQ: Answers to Frequent Questions