Owning a modern smartphone involves the active use of wireless technology, and Bluetooth plays a key role here. Users of Xiaomi, Redmi and Poco devices often wonder about the technical characteristics of their gadget, especially when buying new accessories such as headphones with an aptX HD codec or smart watches with low power consumption.
Knowing the exact version of the communication protocol is essential not only for enthusiasts but also for regular users facing connectivity problems. The Xiaomi version of Bluetooth is determined not only by the phone model, but also by the installed version of MIUI or HyperOS firmware, making the verification process an important diagnostic step.
In this article, we will break down all the methods available to identify the communication module, and you will learn to use hidden engineering menus, ADB commands, and system reports to get comprehensive information about the capabilities of your device.
Why do you need to know the Bluetooth version?
Understanding what standard of communication your smartphone supports directly affects the quality of interaction with the periphery. TWS-codec-enabled headphones LDAC or aptX Adaptive, you need to make sure your Bluetooth module is capable of handling them.
In addition, different versions of the protocol have different ranges and data rates, older versions may not support simultaneous connection to multiple devices or Bluetooth Low Energy (BLE) functionality, which is critical for fitness trackers and smart homes.
Knowing the version also helps in troubleshooting, and if you are experiencing persistent connection breaks or poor sound quality, checking the versioning on your phone and accessory is the first step to solving the problem.
- 🎧 Defining support for quality audio codecs for lossless music.
- ⚡ Energy efficiency assessment when working with wearable electronics.
- 📡 Understanding the real range and signal stability.
- 🔗 Checking the possibility of simultaneously connecting several gadgets.
Verification through the engineering menu and request code
The fastest way to access technical information on Xiaomi devices is through the built-in engineering menu, which requires no third-party software installation and works on most MIUI-enclosed models.
To start, open the standard Phone app and go to dial. You need to enter a special character combination that activates the hidden hardware testing mode. Enter the code ##6484## on the keyboard.
Once you enter the last character, the screen will automatically switch to the CIT menu, which is a long list of tests for all components of the smartphone, and you'll scroll down the list and find the item associated with Bluetooth.
The Bluetooth testing section often displays information about the version of the chip and the stack used, but on some models, this information may be hidden or presented as code, in which case, look at the Version string or HCI Version.
⚠️ Warning: Do not change the settings in the engineering menu unless you know what they are responsible for. Accidental activation of test modes can lead to malfunction of communication modules.
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If the ##6484## code doesn’t work, try the alternative #4636## that opens the Android Test Menu.
Use of USB debugging and ADB commands
For users who want the most detailed data, the ideal solution is to use Android Debug Bridge (ADB), which allows you to request a full Bluetooth stack log from the system, ignoring the limitations of the user interface.
First, activate the developer mode. Go to Settings → About Phone and click 7 times on the MIUI Version or OS Version field. Then, in the advanced settings, turn on “Debugging by USB”.
Connect your smartphone to your computer via a quality cable. Open the command line on your PC and type a command to get a list of connected devices to make sure you're connected: adb devices. If the device is displayed, you can request Bluetooth information.
adb shell dumpsys bluetooth_managerThe result of the command execution will be a volumetric text file. You are interested in the Local Capabilities section or strings containing LMP Version. The digital code specified there corresponds to a specific version of the standard (for example, 9 is Bluetooth 5.0, 10 is 5.1, 11 is 5.2).
- 🔌 Requires PC and installed drivers ADB.
- 📄 Provides the most accurate and complete technical information.
- 🛠 Allows you to see supported features and profiles.
- 🔍 It works even if the smartphone interface does not display the version.
Analysis of system reports and Bug Report logs
The Android operating system, which runs HyperOS and MIUI, has an error reporting feature, which contains the complete hardware and software configuration at the time of creation.
To create a report, go to Settings → About Phone → The kernel version (or through the developer menu “Create an Error Report”). After you form the file (this can take a couple of minutes), save it and open it with a text editor.
Inside a file that usually has a.txt or.zip extension, use keyword search. hci_version You will find a line that lists the chip manufacturer (often Qualcomm or MediaTek) and the protocol version.
The good thing about this method is that it doesn't require a real-time connection to a computer, but it does require the ability to navigate large volumes of technical text. Look for a section that starts with the words Bluetooth System Report.
☑️ Preparation for the report
Table of version correspondence and their characteristics
Once you have a digital code or version name, it’s important to understand what it means. Different generations of Bluetooth offer different data rates and power saving features.
Below is a table that will help decipher the data, and note that the newer versions are backward compatible with the older versions, but work in compatibility mode without revealing their full potential.
| Version. | LMP code | Max, speed. | Key features |
|---|---|---|---|
| 4.2 LE | 6 | 1 Mbps | Basic energy conservation |
| 5.0 | 9 | 2 Mbps | Increased range by 4 times |
| 5.1 | 10 | 2 Mbps | Accurate location determination |
| 5.2 | 11 | 2 Mbps | Advanced Audio (LE Audio) |
| 5.3 | 12 | 2 Mbps | Stability and security |
It’s worth noting that having version 5.0 or higher on paper doesn’t guarantee all features.The smartphone manufacturer (Xiaomi) can software-limit the chip’s capabilities to save battery life or reduce the cost of the device.
Version definition through apps from Google Play
If you don't want to mess with codes and logs, you can use specialized utilities. There are many applications in the Google Play store that read system information and display it in a convenient way.
A popular program like Bluetooth Version Checker or AIDA64 scan the device and show not only the version of the protocol, but also MAC-Address, connection status and channel load, this is the most friendly way for beginners to do it.
But privacy is a good thing to remember, because these applications often request geolocation access and contact lists under the pretext of finding devices.
Why can apps show different information?
Impact of MIUI and HyperOS Updates on Bluetooth
The software plays a critical role in wireless modules, and Xiaomi regularly releases security and firmware updates that may contain patches for Bluetooth drivers.
Sometimes, after upgrading to a new version of MIUI, users notice an improvement in connection stability or, conversely, the appearance of new bugs, this is due to the fact that not only the interface is updated, but also low-level communication components.
If you find your phone stopped seeing devices or is running slower, try checking for system updates. Go to Settings → About Phone → MIUI version and press the check button.
⚠️ Warning: Be sure to back up the data before updating the firmware. The update process can take time, and power interruption at this point is dangerous.
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The current firmware version often contains Bluetooth bug fixes that are not solved by simply restarting the phone.