Modern Xiaomi and Redmi smartphones are often the center of a multimedia ecosystem of the user, where wireless audio and data transmission plays a critical role. Many owners face a situation where you need to accurately identify the characteristics of the radio module for compatibility with new headphones or game controllers. the standard menu settings MIUI and HyperOS, unfortunately, does not provide direct information about a particular Bluetooth standard, hiding technical details from the average user.
Determining the exact protocol specification is important not only for enthusiasts, but also to solve problems with intermittent connection or poor sound quality. The Bluetooth version affects power consumption, range and support for codecs like aptX HD or LDAC. In this article, we will detail all the available ways to obtain this information, from simple system reports to the use of advanced debugging tools.
It should be noted that manufacturers often use the same processors for different models, but the software shell can limit the display of data. Therefore, the methods described below are universal and will suit both the old Redmi Note models and the flagship Xiaomi 13 and 14 series.
Verification through system error reports
The safest and most affordable way, without root rights or a computer connection, is to generate a system report. Android automatically collects detailed information about all hardware components, including radio modules, when creating an error log. You don't need to cause a real error, just initiate the creation of a report through the developer menu.
To start, activate the debugging mode if it is not already enabled. Go to Settings → About Phone and quickly click 7-10 times on the field of the MIUI Version or OS Version. After the notification that you have become a developer, go back to the main settings menu and find the section Additional → For developers.
Inside the developer menu, scroll down to the Debugging section and select Take bug report. The system will suggest you select the report type — select Full report. The data collection process can take a few minutes, after which a corresponding message will appear in the notification curtain.
- 📱 Click on the notification and select Share to send the file to your messenger or save to the cloud.
- 📂 The file will have a.zip extension, inside which there are many text logs.
- 🔍 Open the archive and find a file with a name containing a bugreport or main_log.
- 📝 Search for text inside the file by typing in a “bluetooth version” or “hci version” request».
⚠️ Note: The report file can be very large (hundreds of megabytes), so make sure the device has enough free memory before generating it.
Inside the text log, look for lines that contain HCI Version or LMP Version keywords, and these are the parameters that indicate a specific protocol revision. For example, LMP 9 corresponds to Bluetooth 5.0, and LMP 10 corresponds to Bluetooth 5.1. This method gives the most accurate information directly from the system drivers.
Use of engineering menus and hidden codes
The engineering menu is a powerful diagnostic tool built into Android-based firmware. On Xiaomi devices, access is often limited or modified by the manufacturer, but an attempt to log in through special devices is made to the user. USSD-This method allows you to see the current status of the connection and technical parameters without installing third-party software.
Try entering ##6484## in the dialer. If the device supports the standard CIT engineering menu, the test list will open. Find a item related to Bluetooth or BT Test. Inside the test, the device address, status, and sometimes the firmware version of the module will often be displayed.
Alternative code ##4636## opens the testing menu. Go to Bluetooth Information (if available) and it may display the status of the switch on, but protocol detailing is rare on newer versions of MIUI due to Google's security policy.
What do I do if the codes don't work?
If the standard codes don't work, you can try using ADB commands to call the activity of the engineering menu directly. To do this, connect your smartphone to your PC and execute a command to start a specific activity.
adb shell am start -n com.android.settings/.HardwareInfoHowever, the path to activity may vary depending on the processor model (Snapdragon or MediaTek). MediaTek devices often run com.mediatek.engineermode activity, but running it requires system privileges.
Diagnostics through ADB and logging in real time
The most professional and reliable way is to use Android Debug Bridge (ADB), which allows you to “question” the system directly about the characteristics of a Bluetooth adapter, bypassing the graphical interface. You will need a computer (Windows, macOS or Linux) and enabled debugging over USB on your smartphone.
First, you need to configure your environment. Download the platform-tools from Google's official website, unpack the archive and connect the phone with a cable. In the command line (Terminal or CMD), type in the connection verification command:
adb devicesOnce the fingerprint is confirmed on the smartphone screen, the device will appear in the list. Now we use the command to obtain Bluetooth properties. In Android, the properties are stored in the system and can be requested through getprop.
adb shell getprop | grep bluetoothThis query will list all the parameters associated with Bluetooth, look for ro.bluetooth.version or similar strings, but more informative is using the dumpsys command, which gives the state of system services.
adb shell dumpsys bluetooth_managerThe output of this command contains a huge amount of data. To avoid getting lost in text, use a filter. In Windows (PowerShell) or Linux/macOS, the command will look like this:
adb shell dumpsys bluetooth_manager | findstr "version"Or for Linux/Mac:
adb shell dumpsys bluetooth_manager | grep "version"⚠️ Note: The dumpsys command can run slowly on older devices. If the output is cut, try redirecting the result to the file: adb shell dumpsys bluetooth_manager > bt_log.txt.
You can also use hciconfig (if you have root rights) or btmon to sniffer traffic, but for simple version verification, this is redundant.
☑️ Preparation for diagnosis through ADB
Analysis of system files and chipset specifications
The Bluetooth version is tightly tied to the chipset (SoC) installed in the smartphone. Knowing the exact model of the processor and modem, you can 100 percent determine the supported version of the protocol, since chip manufacturers (Qualcomm, MediaTek, Samsung) do not change the characteristics within the same model of the chip.
You can find out the processor model in the Settings menu → About the phone or through applications like CPU-Z. Next, you need to consult the technical documentation (datasheet) of the chip manufacturer. For example, the Snapdragon 8 Gen 2 processor always goes in conjunction with the FastConnect 7800 module, which supports Bluetooth 5.3.
Below is a table of correspondence between popular platforms used in Xiaomi and Bluetooth versions:
| Platform (SoC) | Communication module | Bluetooth version | Examples of devices |
|---|---|---|---|
| Qualcomm Snapdragon 8 Gen 3 | FastConnect 7800 | 5.4 | Xiaomi 14 Ultra |
| Qualcomm Snapdragon 8 Gen 1 | FastConnect 6900 | 5.2 | Xiaomi 12, POCO F4 GT |
| MediaTek Dimensity 9200+ | Filogic | 5.3 | Xiaomi 13T Pro |
| Qualcomm Snapdragon 695 | FastConnect 6700 | 5.1 | Redmi Note 11 5G |
| MediaTek Helio G99 | Custom MediaTek | 5.2 | Redmi Note 12, POCO M5 |
This method is especially useful if the software methods do not give a clear answer. The specifications of the chipset are the physical constant of the device. Even if the software claims a lower version due to drivers, the hardware can often be larger.
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When searching for chipset specifications online, add the word “datasheet” or “specification” to the name to find an official document from Qualcomm or MediaTek, rather than a review on the store’s website.
Third-party applications for deep diagnostics
If you don't want to mess with the command line, you'll find specialized apps from Google Play, but most of the usual blue cloves only show basic information, and we need tools with access to system APIs.
One of the best solutions is the Device Info HW app, which can read data about cameras, sensors and, importantly for us, Bluetooth, and then go to the Device or Network tab after you run it.
Another powerful application is AIDA64, which provides comprehensive information about the system, and in the “Bluetooth” section you can find the “Version” line, and you should also look at the Bluetooth Scanner app, which specializes in analyzing available devices and their characteristics, which indirectly helps you understand the capabilities of your adapter.
- 📲 Device Info HW: Shows the exact Bluetooth chip model and version HCI.
- 🛠️ AIDA64: Universal combine harvester, displays data from the system registers of Android.
- 📡 Bluetooth Scanner: Useful for checking supported profiles and codecs in real time.
It’s important to understand that without root rights, even these apps can show information that the system allows them to read. On some Xiaomi firmware, access to real data about the Bluetooth version for third-party applications is closed.
Frequent problems and data interpretation
Users often confuse the Bluetooth version of the smartphone itself with the version of the connected device. In logs and applications, this data can be mixed. Always look for the Local Version field, which is a characteristic of your Xiaomi.
Another nuance is the difference between the stated version and the actual work: for example, the phone can support Bluetooth 5.0, but due to antenna or interference to operate in 4.2 mode. Also affected by the region: in some countries, signal power is limited by law, which can be perceived as a “weak version”.
⚠️ Note: If the system has a version lower than the model specification (e.g. 4.2 instead of 5.0), it is possible that custom recavators or modified firmware with stripped-down drivers are installed.
Sometimes, after updating MIUI, users notice a change in the Bluetooth version. This is rarely due to a change in hardware, most likely, software libraries (stack) have been updated, which report on their capabilities differently or, conversely, have received new features.
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The quickest way to find out the version is to look at your smartphone’s CPU specification, as it’s immutable, unlike software reports.