How to check the Bluetooth version on a Xiaomi smartphone

Owners of Xiaomi, Redmi and POCO smartphones often face the need to clarify the specifications of a wireless module, which may be necessary when buying new wireless headphones, gaming controllers or troubleshooting problems with connecting to a smart home. Understanding which version of the Bluetooth protocol your device uses helps predict the range and quality of audio transmission.

Modern communication standards are evolving rapidly, and support for current codecs directly affects the user experience. In the MIUI or HyperOS shell, this information is not always on the surface, but it is available through system logs or special menus. We will analyze all the available methods, from simple settings to advanced diagnostic methods.

For starters, most of today’s mid- and flagship models already have fifth-generation modules. However, budget devices or models of the past can run on standards 4.0, 4.1 or 4.2. The Bluetooth version determines not only speed, but also energy efficiency of the connection, which is critical for the autonomy of the smartphone.

Basic verification through Android settings

The most obvious, but not always informative, way is to look at the standard settings menu, and here you'll see the status of the connection, but rarely the exact version of the protocol. However, this is the first step to understand the status of the module. Go to Settings → Bluetooth and make sure that the slider is active.

If you connect a device, the system can display a profile (supported profiles), which indirectly indicates the capabilities of the module. For example, the presence of aptX HD or LDAC codecs usually indicates support for standards not lower than 4.0, but more often 5.0.

⚠️ Note: Standard settings menu in MIUI It often hides the technical version of the chip, showing only the status of "Connected." Don't rely on this screen for accurate diagnosis.

For a deeper analysis, you'll need to go to system information. In some firmware versions, Bluetooth version data can be displayed in the About Phone section if you repeatedly click on the build number, but this doesn't work on all models, and most often you need to use engineer codes.

💡

Before checking, make sure that the Bluetooth module itself is turned on on on the smartphone, otherwise system reports may not be formed correctly.

Use of engineering menus and codes

The most reliable method for Xiaomi devices is to use a hidden engineering menu, which provides access to low-level parameters of the radio module, and to enter the diagnostic menu, you need to open the Phone application and enter a special combination of characters.

##6484##

This team opens the menu. CIT (Customer Interface Test: You can find a Bluetooth-related item (often called the Bluetooth Test or Version Information) and click on it and you can see detailed information about the chip, including the chip. MAC-address and protocol version.

• 📱 Version. HCI: Shows a version of the host controller interface, which is critical for compatibility.
• 📡 Local Version: Local version of the firmware of the Bluetooth module.
• 🔗 LMP Version: A version of the link manager that often correlates with the standard version (e.g., the link manager version, 9.x It is also Bluetooth 5.0).

The interface may vary depending on the Android version and regional firmware, and if the code doesn’t work, it may be blocked by the operator or manufacturer in your version of the software, then try the alternative code ##4636##, which opens the testing menu.

Analysis through the Developer Menu

If the engineering menu is not available, you should consult the developer menu, which is a hidden part of the system, designed to debug applications, but useful for ordinary users. To activate it, go to Settings. → About the phone and seven times quickly click on the item "Version" MIUI" or "Version." OS".

Once activated, a new section will appear in the settings menu, "Additional" or "Extended Settings", where you can select "Developers" and scroll down to the "Network" or "Bluetooth" block. Here you can find the option "Enable HCI Bluetooth log" or "Bluetooth HCI snoop log".

⚠️ Attention: Enabling logging HCI This can slightly increase battery consumption and take up space in memory.

While it doesn't always write the version numeral directly on the menu, activating these features allows third-party apps to read the exact data. It also has the ability to reset Bluetooth settings on this menu, which is useful if the module is unstable. MAP similar technical designations.

Applications for detailed diagnostics

When built-in tools are scarce, Google Play's dedicated tools come to the rescue, which read system files and output information in a convenient way. One of the most popular and reliable tools is the Bluetooth Version Checker app or Device Info HW.

Once installed and launched, the app asks for permission to access location and Bluetooth, which is necessary because the scanning of airspace and reading device identifiers in Android are tied to geolocation, and once you grant permission, you will see a full feature sheet.

AIDA64, which shows not only the Bluetooth version, but also the temperature of the module, as well as the list of supported profiles (A2DP, AVRCP, HFP), allows you to comprehensively assess the wireless capabilities of your Xiaomi.

Decoding of LMP versions and standards

Once the data is received, the user often sees incomprehensible numbers, such as LMP 9.x or LMP 10.x. It is important to be able to interpret these values correctly to understand the real capabilities of the device. LMP (Link Manager Protocol) is a link management protocol, and its version is strictly correlated with the version of the Bluetooth standard.

Knowing this mapping table will make it easy to determine the potential of your smartphone, for example, if the diagnostics show LMP 8, you have Bluetooth 4.2, which is already good for music, but a little old for the latest low-power gaming controllers.

• 🔢 LMP 4.x: Complies with the Bluetooth 2.0 standard + EDR (obsolete).
• 🔢 LMP 6.x: Bluetooth 4.0 (the beginning of the Low Energy era).
• 🔢 LMP 8.x: Complies with Bluetooth 4.2 (Enhanced Security and Speed).
• 🔢 LMP 9.x: Complies with Bluetooth 5.0 standard (range and speed) x2).
• 🔢 LMP 10.x/11.x: It's Bluetooth-compliant. 5.1 / 5.2 / 5.3 (Precise positioning, better sound).

It is important for Xiaomi owners to know that even if the chip supports Bluetooth 5.0, the software limitations of regional firmware (e.g., Chinese firmware) are not very good. CN against Global) may affect some codecs, but the basic version LMP remains unchanged at the iron level.

💡

Version. LMP 9 and above guarantee Bluetooth 5.0 support+, What is necessary for the stable operation of modern TWS-headphones and trackers.

Compatibility problems and their solution

Even if you know your version, you can run into connectivity issues. People often complain that new headphones don't work fully with an old smartphone, or vice versa. This is due to backward compatibility: Bluetooth 5.0 works with 4.0 devices, but the functionality is limited to the weaker link in the circuit.

If you see persistent communication breaks or poor sound quality, the problem may not be the version, but the interference or power saving settings. MIUI is known for aggressive battery optimization, which can "kill" background Bluetooth processes. Check the battery settings for the application using the connection.

⚠️ Warning: If Bluetooth has stopped finding devices after updating your firmware, reset your network settings. This will not delete your photos or contacts, but will return factory settings to the communication modules.

Also consider the physical wear of the antenna module, especially if the smartphone fell or was exposed to moisture. In such cases, the software test will show the version, but the real range will be minimal.

Frequently Asked Questions (FAQ)