Modern Xiaomi and Redmi smartphones are equipped with advanced wireless communication modules that provide stable connection to headphones, fitness bracelets and smart watches. Users often wonder how to view the version of bluetuz in Xiaomi to see whether their device supports high-resolution codecs like aptX HD or LDAC, or to check compatibility with the periphery of the new generation.
Version information isn’t always on the surface of the interface, as the developers of MIUI and HyperOS hide technical details for ease of use, but there are several proven ways to get this data, ranging from standard developer settings to using the command line.
Understanding what standard of communication your gadget has can have a significant impact on sound quality and signal range, and in this article we’ll take a look at all the diagnostic methods available so you can accurately determine your device’s capabilities.
Why do you need to know the version of the Bluetooth module?
The protocol version determines not only data transfer speed, but also the energy efficiency of the connection. For example, owners of wireless headphones often look for an answer to the question of how to find out the version of bluetooth on Xiaomi to make sure that low-power codecs such as aptX Adaptive or SBC are supported. Older versions of the standard may not provide enough bandwidth for lossless audio transmission.
Also, knowing the specifications is essential when buying new accessories.If you plan to connect a smart lock or security sensor that runs on Bluetooth 5.0 or later, it’s important to make sure the smartphone supports the necessary features, such as BLE (Bluetooth Low Energy).
Version incompatibility can lead to unstable operation: frequent connection breaks, increased battery consumption, or inability to activate certain functions of the device.
⚠️ Note: If you find that your smartphone only supports Bluetooth 4.2, don’t expect it to work with the latest audio codecs, as this is a hardware-level limitation.
This knowledge also helps with troubleshooting communication problems, and if you know your device theoretically supports Bluetooth 5.2 but behaves like an older version, it could indicate a software failure or a driver update.
Verification through the developer settings
The most accessible way to get information about the communication module is to activate the hidden menu for developers. This method does not require installing third-party software and is safe for the device. To get there, you need to go to Settings → About the phone and quickly click 7-10 times on the field version of MIUI or OS version.
Once you activate the menu, go to Settings → Advanced Settings → Developer. Here you are interested in the Bluetooth AVRCP Version or simply the list of available versions in the drop-down menu. Although this menu often serves to select the version of the AVRCP protocol, some firmware here displays the current active version of the stack.
Not everyone knows that you can find logging errors in the same menu, and if you scroll down the list, you can find the option to turn on HCI Bluetooth log.
☑️ Activation of the Developer Menu
Sometimes the version of the module is listed next to the device address in the system information if debugging mode is enabled. Note the lines containing Bluetooth MAC Address - next to the revision of the chip may be indicated.
Using the Engineering Menu for Diagnostics
For a deeper analysis, which is often used by service center engineers, there is an engineering menu. To get into it, open a standard phone and type in the code ##6484##. Some Redmi models may have different codes, such as #4636###.
The CIT (Customer Integration Test) test list that opens will look for a Bluetooth-related item, commonly called the Bluetooth Test or BT. When you run the test, the system can output information about the status of the module, including its version, address and antenna status.
It is important to understand that the engineering menu is a diagnostic tool.
⚠️ Note: Do not change the settings in the engineering menu if you are not sure about their purpose, as this may lead to improper operation of the radio module.
In some versions of HyperOS firmware, access to the full report may be limited, so after you enter the Bluetooth test, try pressing the Log or Version Info button if available on the screen, which may contain a string of the LMP Ver (Link Manager Protocol) type that indicates the version of the standard (for example, 9 corresponds to Bluetooth 5.0).
Analysis through ADB and Command Prompt
The most accurate and professional method is the use of Android debugging bridge (ADB), which requires connecting the smartphone to the computer and having an installed ADB driver. It allows you to access system logs, where the exact characteristics of the hardware are specified.
After connecting the device and enabling debugging over USB, execute a command to output information about the Bluetooth controller.
adb shell dumpsys bluetooth_managerYou'll see a lot of lines in output. Look for the hci.version or lmp.version field. The digital value corresponds to the major version of Bluetooth: 6 is 4.0, 7 is 4.1, 8 is 4.2, 9 is 5.0, 10 is 5.1, 11 is 5.2, and so on.
You can also use the getprop command to search for system properties:
adb shell getprop | grep bluetoothThe good thing about this method is that it bypasses the limitations of the MIUI interface and shows data directly from the driver, and if you see the subver value, it can point to the firmware version of the chip itself, which is useful when compared to the manufacturer's reference values.
Third-party characterization annexes
If you don't want to mess with codes and ADB, specialized utilities from Google Play come to the rescue. Applications like Bluetooth Scanner, AIDA64 or Device Info HW can read data about communication modules and output it in an understandable way.
Install an application like AIDA64, and go to the Network or Bluetooth section, which will show the exact name of the chip and the supported version of the standard.
- 📱 AIDA64 — Shows detailed information about all components, including revision of the Bluetooth chip.
- 📡 Bluetooth Scanner – specializes in scanning environments, but in the “About device” section often shows the version LMP.
- 🔧 CPU-Z — A popular tool that in the Device tab can display information about sensors and connections.
It’s worth noting that some cheap Chinese apps may show incorrect data or require excessive permissions.
Why can apps lie?
Use only highly-rated tools proven by developers to avoid installing advertising junk.
Bluetooth Version Comparison and Its Impact on Xiaomi
Understanding the difference between versions will help you assess the potential of your smartphone. Xiaomi has installed different modules in its flagships and budgets over the years. Below is a table of correspondence between the versions of LMP and Bluetooth standards.
| LMP version | Standard Bluetooth | Year out | Key feature |
|---|---|---|---|
| 6 | 4.0 | 2010 | Low Energy (LE) implementation |
| 7 | 4.1 | 2013 | Improved LTE performance |
| 8 | 4.2 | 2014 | Increased transmission speed |
| 9 | 5.0 | 2016 | Increased range and speed (2x) |
| 11 | 5.2 | 2020 | LE Audio and improved sound |
Xiaomi mid-range smartphones released before 2018 were most often equipped with Bluetooth 4.2 modules. The flagships of the Mi series and modern Redmi Note usually have 5.0 and higher.
The presence of versions 5.2 and 5.3 is critical for the use of Dual Audio (simultaneous connection of two pairs of headphones) and stable operation in the conditions of noisy space.
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The LMP version 9 and above is mandatory for the full operation of modern aptX Adaptive codecs and high-resolution audio transmission.
Frequent problems and ways to solve them
Even if the Bluetooth version is relevant, Xiaomi users may experience connectivity issues, often not because of the protocol version, but because of software conflicts in the MIUI shell.
If the device doesn't see the headphones or constantly loses communication, try resetting the network settings. This won't delete your personal data, but will return the Wi-Fi and Bluetooth settings to factory values. → Connection and sharing → Reset Wi-Fi, mobile networks and Bluetooth.
Another reason could be outdated firmware. Xiaomi regularly releases security updates that affect the operation of the Bluetooth stack.
- 🔄 Check for updates in the About Phone menu.
- 🧹 Clear the Bluetooth app cache through Settings → Annexes → All applications → Bluetooth → Memory. → Clean up.
- 📶 Turn off Device Search in Bluetooth settings if you’re not using it to save resources.
⚠️ Note: When resetting your network settings, you will have to re-enter passwords from Wi-Fi networks and re-pair all Bluetooth devices.
In rare cases, flashing the device to a global version helps if you are using a Chinese build where some frequencies or codecs can be cropped.