Owning a modern smartphone from Xiaomi involves the use of many wireless technologies, and one of the most important among them is Bluetooth. Users often wonder how to accurately know the version of the protocol installed on their device, especially when buying new headphones, fitness bracelets or troubleshooting problems with data transfer. The standard shell MIUI or HyperOS does not always provide this information explicitly in the usual settings menu, which creates a certain confusion.
Understanding which module and protocol is installed in your gadget is critical to assessing its compatibility with peripherals. For example, support for high-resolution codecs or long-distance connection stability are directly dependent on the hardware version of Bluetooth. In this article, we will discuss in detail all available diagnostic methods, from simple software solutions to advanced engineering commands.
Many Xiaomi owners mistakenly believe that the software version determines the capabilities of Bluetooth, but this is a hardware characteristic stitched into the chip. However, software interfaces allow you to read data directly from the communication module. We will look at ways to help you get accurate information without having to disassemble the phone or use complex laboratory equipment.
Checking through standard system settings
The first and most obvious step Xiaomi users should take is to look closely at the standard interface. Unfortunately, in most modern models, such as the Redmi Note or the flagship Mi, the direct line “Bluetooth Version” is missing from the About Phone menu. Android defaults to hide technical details in order to simplify the interface for the end user.
However, there are indirect signs that may indicate support for modern standards. For example, having a high-quality audio transmission option in the settings of connected headphones often indicates support for Bluetooth 5.0 and higher. If your smartphone allows you to choose LDAC or aptX HD codecs, this is a sure sign of a modern communication module.
You should also pay attention to the menu "Advanced settings" or the section "Status" SIM-"maps" where sometimes (though rarely) you can find more detailed technical information about the radio module. MIUI for developers, the logging function is available, where the connection parameters are displayed in real time.
- 🔍 Go to Settings. → About the phone and carefully study all subsections for technical specifications.
- 🎧 Check the settings of the connected audio device: the presence of aptX codecs indicates a protocol version at least 4.0.
- 📡 Enable Developer Mode and look for Bluetooth logs in the debugging section if this option is active in your OS version.
⚠️ Warning: Not explicitly specifying the Bluetooth version in the settings menu doesn't mean the device is outdated.This is standard Android shell behavior, hiding technical details.
If standard methods fail, don't despair. There are more reliable ways to access hidden information using system capabilities designed for engineers and developers. Next, we'll move on to deeper diagnostic methods.
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Before checking the Bluetooth version, make sure the module itself is on. When switched off, some diagnostic utilities may not read the chip data correctly.
Using the CIT Engineering Menu for Diagnostics
One of the most powerful tools in the Xiaomi owner’s arsenal is the engineering menu, often called the CIT (Customer Integration Test), which is a hidden part of the system designed to test all hardware components of the device, including wireless communication modules, accessed through special code in the Phone application.
To get into the test menu, you need to dial the combination ##6484## or #3646633##. The interface may vary depending on the processor model (Snapdragon or MediaTek) and the version of MIUI. The list of tests should look for items related to "Bluetooth", "BT Test" or "Wireless".
Within the test mode, not only is the status of the work often available, but the version of the Bluetooth chip firmware that correlates with the version of the standard, such as a string of "Fw Version" or "HCI Version" may contain numbers indicating the protocol generation, which is the most reliable way to get data without installing third-party software.
☑️ Checking in the engineering menu
It's important to understand that the engineering menu is a tool for professionals, and changing the settings in the sections labeled "Config" or "Test Control" can cause the communication module to work in an unstable way, and your job here is to read information, not modify parameters.
In some cases, especially on newer HyperOS models, access to the full engineering menu may be restricted or altered, and if the codes don’t work, it could mean that the carrier or regional firmware is blocking access to diagnostic features.
- 📱 Use the Phone app to enter engineering codes, as they may not work in third-party typing.
- 🛠 Search for "Single Test" or "Version Info" sections within the menu CIT chip-data.
- 🚫 Do not press the Start Test or Loop Test buttons unless you plan to perform a full diagnostic, it can take a long time.
⚠️ Warning: Be extremely careful in the engineering menu. resetting Bluetooth calibration data can lead to a reduced signal range or complete module failure.
Application of third-party applications for detailed information
The most convenient and safe way for the average user is to install specialized utilities from the Google Play store. There are many applications that can read system logs and output detailed information about a Bluetooth adapter. One of the most popular and proven solutions is the Bluetooth Version Checker or AIDA64 application.
These programs request permission to access device information and instantly display the HCI version (Host Controller Interface). It is the HCI version that is a key indicator of the supported Bluetooth standard. For example, HCI Version 10 corresponds to Bluetooth 5.0, and version 11 is Bluetooth 5.1 or 5.2.
The advantage of using applications like AIDA64 or CPU-Z is that it's a holistic approach: you get not only the Bluetooth version, but also information about the processor, memory and sensors, which is especially useful when buying a used Xiaomi smartphone to make sure that the claimed characteristics of reality.
It is worth noting that some “lightweight” versions of applications can only show basic information. To get complete data on supported profiles (A2DP, AVRCP, HID) and codecs, it is better to use full versions of utilities. Free versions are usually quite enough to determine the version of the protocol.
When installing apps, pay attention to the permissions you request. Honest diagnostic software doesn't require access to your contacts, gallery or microphone. If the app requests extra rights, it's best to drop it in favor of more reputable peers.
- 📲 Download the app AIDA64 or similar from the official Google Play app store.
- ℹ️ Go to the “Bluetooth” or “Network” section to view the adapter specification.
- ✅ Pay attention to the field "LMP "Version" or "HCI Version is the main identifiers of the protocol version.
Analysis through ADB and computer diagnostics
For advanced users who are not afraid of the command line, there is a method of obtaining information through the debugging bridge. ADB (Android Debug Bridge. This is a way to get raw data directly from the system, without the interface constraints. You'll need a computer, USB-cable and installed drivers ADB.
After connecting the Xiaomi smartphone to the PC and activating the debugging mode USB (In the "Developers" menu, you can execute a command to output a list of Bluetooth characteristics. bluetooth_manager or adb shell cmd bluetooth_manager get_local_bluetooth_address (Depending on the Android version, it can provide extensive data.
adb shell dumpsys bluetooth_manager | grep "version"The result of the execution of the command will give a lot of lines, among which you need to look for references to the version of LMP (Link Manager Protocol). Knowing the version number of LMP, you can accurately determine the Bluetooth standard. For example, LMP 9 is Bluetooth 5.0, LMP 10 is 5.1, and LMP 11 is 5.2 and higher.
This method is especially useful if the phone is unstable and the GUI is not loading, or if you are checking a custom firmware device where standard applications may be behaving incorrectly. ADB gives access to the system's lower-level information.
Table of correspondence of versions of LMP and Bluetooth
Using ADB requires caution. Incorrectly entering commands can lead to unpredictable system behavior, although read-only commands (get/dump) are usually safe. Make sure you use the current version of the ADB platform tools from the official Android Developers website.
The table of compliance of Bluetooth versions and their characteristics
Understanding the numerical values of the Bluetooth version helps you assess the potential of your Xiaomi device. Each new version of the protocol brings not only increased speed, but also improved energy efficiency and range. Below is a table that will help decipher the data.
| Bluetooth version | LMP version | Maximum speed | Key features |
|---|---|---|---|
| 4.0 (LE) | 6 | 1 Mbps | Low energy consumption, basic support |
| 4.2 | 8 | 1 Mbps | Improved security and IPv6 support |
| 5.0 | 9 | 2 Mbps | Increased range (up to 240m), speed x2 |
| 5.1 | 10 | 2 Mbps | Precise location determination (AoA/AoD) |
| 5.2 / 5.3 | 11+ | 2+ Mbps | LE Audio, improved performance in the noisy air |
As you can see from the table, even a small change in the version number can mean a significant leap in technology. Owners of low-end models Redmi should know that even version 4.2 is quite enough for comfortable use of headphones and fitness trackers, although multipoint (connecting to two devices at once) works better at 5.0 and higher.
Xiaomi flagship devices such as the Mi 11 series, Mi 12 or Xiaomi 13/14 are typically equipped with Bluetooth 5.2 or 5.3 modules.This provides a stable connection even in conditions of heavy air noise in major cities.
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Knowing the exact version of Bluetooth allows you to understand why some new headphones may not support all the claimed features on older smartphones.
The impact of Bluetooth on sound quality and data transmission
The protocol version directly impacts the user experience, especially if you use a Xiaomi smartphone in conjunction with high-quality acoustics. Newer versions, starting with Bluetooth 5.0, offer significantly higher bandwidth, which is critical for lossless audio transmission.
For example, an LDAC or aptX Adaptive codec requires a stable communication channel that only modern modules can provide. If you are a Xiaomi owner with Bluetooth 4.2, you will not physically be able to take advantage of Hi-Res Audio Wireless, as the channel capacity will be limited.
In addition, newer versions of the protocol are better at handling Wi-Fi and Bluetooth simultaneously. In Xiaomi smartphones with 120 Hz refresh rate and active Wi-Fi 6, the old Bluetooth can work with interference, causing jerks of sound. Versions 5.1 and 5.2 use improved collision avoidance mechanisms.
- 🎵 For audiophiles, the minimum version required is Bluetooth 5.0 to support modern high-resolution codecs.
- 🎮 Gamers should pay attention to Bluetooth 5.2, which reduces latency when using wireless gamepads.
- ⌚ For smart watches and trackers version 4.0-4.2 It is very important because it transmits small amounts of data.
⚠️ Note: Even if your smartphone supports Bluetooth 5.0, the headphones should also support this version and the corresponding codecs so you can feel the difference in quality.