How to completely clean Bluetooth on your Xiaomi phone: 5 working ways

If your Xiaomi smartphone (whether it’s Redmi Note 12, POCO X5 or Xiaomi’s flagship 14) starts to connect poorly to headphones, speakers or car systems via Bluetooth, the problem most often lies not in the hardware but in cache or module settings that have gone wrong. Over time, the list of conjugated devices grows, temporary files accumulate, and MIUI firmware can conflict with connection protocols — especially after updates.

In this article, we’ll look at all the ways Xiaomi can clean Bluetooth from basic pairing resets to hidden engineering commands, how to remove “invisible” devices from the module’s memory, reset to factory settings without losing data, and why even a normal phone reboot can sometimes help, and a table with typical Bluetooth errors on MIUI and their solutions.

Basic cleaning: removal of conjugated devices

The first and most obvious step is to remove all stored Bluetooth devices from your phone’s memory, and even if you haven’t used a headphone or speaker in a long time, their data still takes up space in the module’s cache and can cause conflicts when new connections are connected.

How to do this:

• 📱 Open the Settings. → Bluetooth (or Settings) → Connections and sharing → Bluetooth on new versions MIUI).
• 🔍 In the list of conjugate devices, tap on the gear. ⚙️ near every gadget.
• 🗑️ Select “Delete” (or “Forget the device»).
• 🔄 Repeat for all devices, even those that are not currently in use.

Once you delete, restart your phone, and that will clear the Bluetooth memory. Now try to reconnect. If the problem persists, move on to the next one.

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On some Xiaomi models (e.g. Redmi 10C) after removing the device from Bluetooth, it also needs to be removed from the list of “Trusted Devices” in the security settings (Settings → Passwords and Security → Trusted Devices).

2. reset Bluetooth settings without data loss

If simply removing devices didn’t work, the next step is to reset Bluetooth settings, which unlike completely resetting your phone, only affects the wireless module without affecting apps, photos or accounts.

Instructions:

1. Go to Settings. → The phone.
2. Tap 5-7 times on the MIUI version to activate the developer mode (if not already activated).
3. Return to the main settings menu and open Additional settings → For developers.
4. Find the option to Reset Bluetooth settings (or Clear Bluetooth data on some firmware).
5. Confirm the action and restart the phone.

This method removes all stored connection profiles, including hidden system data that is not visible in the normal Bluetooth menu. Once reset, the phone will perceive all devices as new, which often solves connection problems.

Remove all devices from the pairing list|Activate the Developer Mode|Find the item "Reset Bluetooth settings"|Reboot your phone after resetting|Check the connection to the devices again-->

3. Clean up the cache and data of the Bluetooth application

The Bluetooth module in MIUI runs through the system application com.android.bluetooth. Its cache and data can get clogged, especially if you often connect different devices or use features like Mi Share (fast file transfer).

To clear the cache:

• 📱 Open the Settings. → Annexes → Application management.
• 🔍 In search, type “Bluetooth” and select the Bluetooth system app (icon with blue logo).
• 🧹 Click on “Clear Cache” and then “Clear Data” (if there is such a item).
• 🔄 Reboot the phone.

⚠️ Attention: On some firmware MIUI (particularly POCO and global versions) the item "Clean the data" may not be available. ADB-command: adb shell pm clear com.android.bluetooth You will need a computer with drivers installed ADB and the debugging on USB phone-on.

Once the cache is cleared, the phone can search for devices longer when it first connects -- that's OK. If the problem persists, go to the engineering menu.

4. Engineering menu: hidden Bluetooth settings

Xiaomi has a hidden engineering menu where you can reset the Bluetooth module at the firmware level, which helps when standard methods don’t work, but requires caution – wrong actions can disrupt other wireless modules (Wi-Fi, NFC).

How to open the engineering menu:

1. Open the Phone app and enter the code: ##4636###
2. In the menu that appears, select Phone Information (or Testing on some models).
3. Scroll down to the Bluetooth block and tap it.
4. Find the Reset Bluetooth or Clear BT Config option and confirm the reset.

If the #4636### code doesn’t work, try an alternative for the new models:

##2846579## → ProjectMenu → Background Setting → BT Setting → Reset

⚠️ Attention: On some firmware MIUI (In this case, the engineering menu can be blocked. MTK Google Play’s Engineering Mode – It Emulates Access to Hidden Settings.

5. Complete network reset (including Bluetooth)

If none of the previous methods worked, you'll have to completely reset your network settings, and this method removes all the stored connections -- Wi-Fi, mobile, Bluetooth, and VPN -- and the application data and files on your phone will remain intact, but you'll have to re-enter your Wi-Fi passwords.

How to reset your network settings:

• 📱 Go to Settings. → SIM-maps and mobile networks (or settings) → Connections and sharing).
• 🔧 Select Network Settings Reset (or Wi-Fi, Mobile Network, and Bluetooth Reset).
• 🔐 Confirm the action with a pattern lock or PIN-code.
• 🔄 The phone will automatically reboot.

After discharge:

• 🔄 Bluetooth will work like a new phone – all devices will have to connect again.
• 📶 Wi-Fi networks will also be deleted, so remember your passwords in advance.
• 📵 You may need to re-configure the mobile Internet (APN).

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Network resets are the most radical, but also the most effective way to fix Bluetooth problems, and use them if other methods fail, but remember: all stored networks and devices will be deleted.

6. Checking hardware problems

If, after all the manipulations, Bluetooth on Xiaomi still doesn't work, the problem may be hardware. Here are signs that it's not the software part:

• 🔴 Bluetooth does not turn on at all (tumbler in the settings is inactive).
• 🔍 The phone doesn’t find any devices, although they work with other gadgets.
• 🔌 Connection is permanently cut, even after resetting.
• 📱 A notification appears on the screen “Bluetooth Error».

What to do in this case:

1. Check the antenna: On some Xiaomi models (like the Redmi 9A), the Bluetooth antenna contacts can move away from the motherboard, often after a phone falls or disassembles.
2. Test in Safe Mode: Press the power button, hold the "Stop" button until the "Safe Mode" option appears. If Bluetooth is up, it's the third-party app's fault.
3. Update your firmware: go to Settings → About Phone → System Update and install the latest patches.
4. If the warranty is still valid, do not try to repair yourself - Xiaomi may refuse free repairs.

Regularly, once a week |Sometimes, once a month | Nearby, but I reboot | Never had a problem |I don't use Bluetooth-->

FAQ: Frequent questions about Bluetooth on Xiaomi