Users of Xiaomi, Redmi and POCO smartphones often face the need to clarify the specifications of their device, especially wireless interfaces when it comes to understanding whether the gadget supports the latest codecs or a stable connection with smartwatches. The standard shell of MIUI or HyperOS does not always provide this information in the obvious settings, hiding it from the usual view.
Determining the exact specification of a Bluetooth module is essential to diagnosing problems with sound or data rate. For example, if the headphones are not working at high quality, it may be that your phone has an older version of the protocol that does not physically support modern codecs like aptX HD or LDAC. Understanding this nuance helps to avoid unnecessary costs to buy a new periphery.
In this article, we will look at all the available ways to get detailed information about wireless connectivity, we will look at both software methods through the hidden developer menu and the use of specialized software from Google Play, and we will also touch on the ADB command line for advanced users who need complete data about the hardware of the smartphone.
Why you need to know the Bluetooth version on your smartphone
The main reason for the interest in this technical detail lies in the compatibility of accessories. Modern smartwatches, fitness trackers and wireless headphones often require a certain minimum version of the protocol for the correct operation of all functions. If your Xiaomi has an old module, some devices may simply not be defined in the system or work with frequent communication breaks.
In addition, the version is dependent on power consumption and range, newer standards such as 5.0 and higher provide significantly better energy efficiency than their predecessors, which directly affects how quickly your phone’s battery drains when you use your wireless headset actively throughout the day.
⚠️ Note: Do not confuse the Bluetooth hardware module version with the software or drivers version. The hardware part cannot be changed, it is sewn into the chip, while software updates can only improve the stability of the existing hardware.
Also, knowing the specifications is important when buying a phone from hand or in the secondary market. Sellers do not always specify the exact model of the processor, and it is from it (or from the associated module). Wi-Fi/BT) Verification through system utilities allows you to instantly verify the declared characteristics of the device.
Using Xiaomi’s Engineering Menu to Check Out
The fastest way to access hidden communication module information on Xiaomi devices is to use an engineering menu built into the Android shell, which allows you to diagnose the state of the equipment without installing third-party software. To enter this menu, you need to open the standard Phone application and type a special combination of characters.
Enter the code ##6484## or ##4636##. Once you enter the last digit, the menu should open automatically. If this does not happen, your carrier or firmware may block this access.
Device Information often displays detailed statistics on the current connection inside the Device Information section, but it is worth noting that newer versions of MIUI 13/14 and HyperOS may restrict access to the full list of features through this code, so you will see only the on/off status, not the protocol version.
What if the code doesn't work?
If the standard code didn't work, you can try an alternative method through the developer's settings. Activate this mode by clicking seven times on the build number in the About Phone section. Then, in the developer menu, look for the Bluetooth HCI snoop log section, which allows you to log traffic, but indirectly confirms the presence of certain debugging functions.
Verification through system analysis applications
The most reliable and easy way for the average user is to install a specialized application from the Google Play store. There are many utilities that read information directly from Android system files, providing a complete picture of the hardware stuffing of the smartphone. This eliminates the need to memorize codes and risky manipulations.
One of the most popular and time-tested tools is AIDA64, which provides comprehensive information not only about Bluetooth, but also about the processor, sensors and network, and after installation, you just start the scan and go to the appropriate menu section.
- 📱 Download. AIDA64 or CPU-Z from the official app store.
- 🔍 Launch the application and wait for the system analysis to be completed.
- 📡 Go to the tab “Network” or “Bluetooth».
- ℹ️ Find the line Version or Bluetooth Version where the number will be specified (e.g. 5.2).
Another great option is the Device Info HW app. It often shows even a model of the chip responsible for wireless communication, which is useful for deep diagnostics. Unlike standard Android settings, these programs have access to low-level APIs, so the data here is always more accurate.
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When using analyzers, pay attention to the item "Bluetooth Low Energy" (BLE). If present, your phone supports energy-saving communication mode, which is important for working with fitness trackers.
Version definition through developer settings
There's a hidden partition in the Android operating system that's designed to debug apps and test features, and you can find information about the Bluetooth stack here, although it's often presented in a technical way, and you need to activate the developer mode first if you haven't already.
Follow the Settings → About Phone path and quickly click 7 times on the MIUI Version (or OS Version). After the notification “You are a developer” appears, go back to the main settings menu and find the option “Additional” or “Extended Settings” where the developer menu is hidden.
Inside the menu, scroll down to the Network or Bluetooth block. There may not be a straight line with the version, but the presence of items like Bluetooth Audio Codec will indirectly indicate the module's capabilities. If you have aptX Adaptive or LDAC codec available, you have a Bluetooth version at least 5.0.
| Bluetooth codec | Minimum version of BT | Sound quality | Delay (MS) |
|---|---|---|---|
| SBC | 2.0+ | Basic | 200+ |
| aptX | 4.0+ | Good. | 100-150 |
| aptX HD | 4.2+ | High. | 150+ |
| LDAC | 4.2+ | Hi-Res Audio | 100-200 |
It's important to understand that the developer's settings are a testing tool. Changing the settings here without understanding the consequences can lead to unstable connection operation. The HCI login included in this menu can take up space in the phone's memory, so it's best to turn it off after checking.
Using the ADB Command Line for Experts
For users who are not afraid of the computer and want to get the most accurate data directly from the system, the method using Android Debug Bridge is suitable (ADB). This method requires connecting the smartphone to the PC through USB-It allows querying system properties that are not visible in the interface.
First, you need to enable USB debugging in the developer menu on your phone. Then, when you connect the device to your computer, open the command line or terminal in the folder with the ADB installed. Enter the command to check for communication with the device: adb devices. If everything goes well, you will see the serial number of your Xiaomi.
adb shell dumpsys bluetooth_managerThis command will output a huge log of the Bluetooth manager's work. The output often starts with the version of HCI (Host Controller Interface) that matches the Bluetooth version. Look for lines that begin with "Local Version" or "LMP Ver." This is the most reliable technical way to diagnose.
⚠️ Attention: When working with ADB Be careful. Entering unknown commands can change your system settings. Use only read commands (getprop, dumpsys) if you are not sure what you are doing.
Alternatively, you can use the adb shell getprop | grep bluetooth command to filter out all the properties associated with bluetooth, and you can find ro.bluetooth.version, which indicates the standard that the device is certified to, but manufacturers don't always fill in this setting correctly.
☑️ Check through ADB
Comparison of Bluetooth versions and their impact on work
Understanding the difference between wireless generations helps you assess the potential of your gadget. Each new version brings not only increased speed, but also improved algorithms for working in a noisy ether environment. For smart home owners, this is a critical parameter.
Versions up to 4.0 are considered obsolete and almost never found in modern Xiaomi smartphones. Since 4.0 (BLE), the emphasis has shifted to energy saving. Version 5.0 brought range increases of up to 4 times and speeds of up to 2 times compared to 4.2. And version 5.2 and higher (LE Audio) introduces new audio codecs and the ability to connect to multiple devices at the same time with better quality.
If your phone only supports Bluetooth 4.2, you won't be able to use the audio function to two devices at once or use the new spatial audio features. This is a hardware limitation, and software can't get around it. Only replacing your smartphone with a newer model will solve this problem.
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The Bluetooth version is a hardware feature. No firmware update will turn Bluetooth 4.2 into 5.0 if the chip doesn't physically support that standard.