Why Xiaomi Redmi 6 turns on Bluetooth itself: all the reasons and how to fix it

Why the smartphone behaves like a “ghost”

Have you noticed that your Xiaomi Redmi 6 Bluetooth turns on on its own without you? It's not only annoying, it's also draining the battery, and sometimes even creating security risks. In this article, we'll look at all the possible causes of this behavior, from banal crashes to hidden MIUI features that you might not know about.

Redmi 6 (codenamed cereus) was released in 2018 on the basis of Android 8.1 Oreo with the shell MIUI 9/10. Despite the age, many users still use this smartphone, and the problem of spontaneous switching on Bluetooth is common. It is important to understand that this is not always a hardware malfunction. 80% of cases are to blame for software or settings.

We analyzed user reports on forums (including 4PDA, Mi Community, and XDA Developers), official Xiaomi documentation, and even firmware source code, and found that the problem may lie in one of 7 key factors — all of which are fixable.

1. Automatic MIUI features you didn't know about

MIUI is known for its abundance of hidden features, many of which run in the background, some of which are directly connected to Bluetooth and can activate the module without your knowledge.

• 🔄 Bluetooth File Transfer: If you’ve ever used Mi Drop or ShareMe, the system could save your automatic device search settings.
• 🎧 Connection of audio devices: MIUI remembers frequently used headsets and can turn on Bluetooth when found in range.
• 🚗 Driving Mode: In the security settings there is an option to automatically connect to a car tape recorder.
• 📱 Sync with other Xiaomi devices: If you have a Mi Band, smartwatch or Mi speaker AI Speaker, the system can wake up Bluetooth for background synchronization.

How to check? Go to Settings → Connected Devices → Bluetooth and look at the Auto Connection section. If there are boxes in front of devices, uncheck them. Also look at Settings → Apps → Permissions → Auto Run and turn off background activity for Mi Drop, ShareMe and Mi Bluetooth.

⚠️ Warning: Disabling Autostart for System Applications May Lead to Workouts MIUI. If there are errors after the changes, return the settings back.

2. firmware failures: MIUI and Android bugs

Xiaomi Redmi 6 has not officially received Android updates since version 9.0 Pie (released in 2019), which means that the system may remain unpatched bugs associated with the management of the Bluetooth module.

• 🐛 Service conflict: In system logs (Settings) → The phone. → Error report) you can find crash records in bluetoothd or bt_stack.
• 🔄 Incorrect update: If the firmware was installed intermittently (for example, through Recovery without cleaning the cache), the Bluetooth module may not work stable.
• 📱 Custom firmware: Users who have installed LineageOS or Pixel Experience often encounter bugs in Bluetooth drivers.

How do you diagnose? Install Bluetooth Auto Connect (free on Google Play) and it will show the log of the module's on/off. If there's a record like this. auto_enabled_by_system — firmware.

Critical information: If you see an error in the logs bt_stack crash, this indicates a hardware failure of the Bluetooth controller, in which case only repair or replacement of the motherboard will help.

3. Viruses and malware: hidden threats

One of the most insidious causes is malware applications that use Bluetooth to distribute or collect data. In 2022, Kaspersky’s lab discovered a Trojan called “FluBot” that activated Bluetooth on infected devices to search for new victims.

How to check your smartphone for viruses:

1. Install Malwarebytes or Dr.Web Light.
2. Start a deep scan (not fast!).
3. Pay attention to applications with permissions BLUETOOTH_ADMIN and BLUETOOTH_CONNECT In Settings → Annexes → Permits.

Typical "symptoms" of infection:

• 📱 Bluetooth is turned on at night or when the phone is lying idle.
• 🔋 Quick battery discharge even in standby mode.
• 📤 Unknown devices in connection history (Settings) → Bluetooth → History).

⚠️ Warning: If you find a suspicious app, don't delete it directly! first turn off the internet and Bluetooth, then uninstall via Safe Mode (press the power button) → Safe regime).

Malware testing|Bluetooth and Wi-Fi Disconnection|Removal of suspicious applications|Resetting network settings|Firmware update-->

4. Hardware malfunctions: when the "iron" is to blame

If software methods fail, the problem may lie in the hardware. Xiaomi Redmi 6 is equipped with a Qualcomm Snapdragon 625 chip, which integrates the Bluetooth module QCA6174.

• 🔥 Overheating: If your smartphone gets hotter frequently (such as during games or charging), the controller may have been damaged.
• ☠️ Contact oxidation: Moisture ingestion or corrosion on the motherboard.
• ⚡ Voltage spikes: A poor-quality charger or discharged battery can damage the module's power circuit.

How to diagnose a hardware malfunction:

1. Check if Bluetooth is enabled in Safe Mode (if yes, it is the software’s fault, if not the hardware).
2. Connect your smartphone to your PC and start the command: adb shell dumpsys bluetooth_manager If you have a line with error or failed in the output, it is a hardware error.
3. Try to turn on Flight Mode for 10 minutes, and if Bluetooth switched on itself after it left, the controller is the problem.

Cost of repair:

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If the smartphone is still warranty, don't open it yourself! Contact Xiaomi's service center - in 2026 they still accept Redmi 6 under the post-warranty service program.

5. Conflict with other wireless modules

Bluetooth and Wi-Fi in Redmi 6 use the same chip (QCA6174), so problems with one module can affect the other.

• 📶 Wi-Fi shuts down on its own → Bluetooth is turned on (and vice versa) and this is due to the reallocation of chip resources.
• 🔄 Frequent Wi-Fi network change can trigger Bluetooth module diagnosis.
• 📡 Modem Modem: If you have ever used the Access Point, the system could save the automatic device search settings.

How to fix it:

1. Go to Settings → Wi-Fi → Additional → Wi-Fi Mode and select “Only 2.4GHz” (this will reduce the load on the chip).
2. Turn off the function of Automatic connection to open networks in the Wi-Fi settings.
3. Reset network settings: Settings → System → Settings Reset → Reset settings Wi-Fi, mobile network and Bluetooth.

Important: If the problem disappeared after the reset, but then came back, the app you installed later is to blame. Try to remember what you put before the bug reappeared.

6. Hidden developer settings and debugging functions

Xiaomi Redmi 6 has hidden settings that can affect how Bluetooth works, and many users accidentally activate them in an attempt to speed up the smartphone or improve communication.

Key parameters that are worth checking:

• 🔧 Bluetooth Debugging Mode: Settings → For developers → Bluetooth debugging (should be turned off).
• 📡 Aggressive Wi-Fi Scanning: Settings → For developers → Wi-Fi scanning is always available (turn off!).

MIUI also has a hidden Bluetooth Auto-On feature that turns on the module under certain conditions (e.g. when you connect your headphones) to turn it off:

1. Install the Bluetooth Auto Connect app.
2. Go to the Automatic Rules section and turn off all triggers.
3. Manually add the rule “Never turn on Bluetooth automatically.”

⚠️ Warning: Changing the settings for developers can lead to unstable operation of the smartphone. If after disabling the options there are lags or errors, return everything back.

7. Battery and energy saving: an unexpected connection

Few people know, but Bluetooth on the Xiaomi Redmi 6 may be powered on because of the power saving modes, the fact that the system tries to optimize battery consumption by switching communication modules in the background.

Where to look for the problem:

• 🔋 Adaptive battery: Settings → Battery → Adaptive battery (turn off!).
• ⚡ Ultra mode: In extreme saving mode, Bluetooth should turn off, but sometimes it crashes.
• 📊 Application optimization: Some applications (e.g. Google Maps or Yandex.Navigator) may request Bluetooth enabled to accurately determine location.

How to check:

1. Go to Settings → Battery → Battery → Battery Use and see which apps are using up energy in the background.
2. Open Settings → Applications → Battery Management and turn off optimization for all Bluetooth-related applications.
3. Install the CPU Spy app and check if the processor is not waking up (bluetoothd) for no reason.

Important: If your Redmi 6’s battery is already worn out (less than 70% capacity), it may cause false positives of energy-saving features.

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If the problem occurs after a battery change, check the quality of the battery. Cheap analogues can give unstable voltage, which leads to malfunctions in the Bluetooth module.

FAQ: Frequent questions about spontaneous Bluetooth switching on