Owners of Xiaomi, Redmi and Poco smartphones often face the need to check the technical characteristics of their device, in particular, support for current wireless protocols. Understanding which version of Bluetooth is installed in your gadget is critical when buying new wireless headphones, fitness trackers or game pads. Modern standards provide not only stable connection, but also high quality audio transmission, as well as low power consumption.
Unfortunately, in the standard settings menu of the Android operating system with a MIUI shell or HyperOS, this information is often hidden from the eyes of the average user. Manufacturers rarely put the technical specifications of the chipset in a prominent place of the interface, preferring to leave this data in the documentation or on the manufacturer's website. However, there are proven methods to circumvent this limitation and get accurate data about the communication module.
In this article, we’ll look at several ways to learn the version of Bluetooth on Xiaomi, from simple specs analysis to the use of specialized software. You’ll learn to define support for high-resolution codecs and understand why your phone may not see new devices.
Analysis of official characteristics and documentation
The most reliable and secure way to find out the Bluetooth version is to consult official sources of information about your model. Every smartphone released by Xiaomi has a technical passport that clearly spells out the capabilities of wireless modules. You do not need to install third-party programs or risk system stability, just know the exact name of the device model.
Find on the back of the smartphone or in the tray for SIM-A map marking of a model that usually looks like an alphanumeric code (e.g., a map, M2102J20SG). Enter this code in the search engine or on the manufacturer's official website in the support section. In the "Specifics" or "Factories" section, look for "Wireless Networks" or "Connectivity" and it will show the exact version of the standard, for example, Bluetooth 5.0, 5.2 or 5.3.
Consider that the same model may come with slightly different components in different regions. Regional firmware may sometimes limit functionality, but the physical Bluetooth module tends to remain the same across all device modifications. If the specifications include multiple versions, focus on the one that matches your smartphone’s release date.
Why are the versions different from different sources?
Use of specialized applications
If you find documentation too long, you can use third-party software that reads information directly from the Android system. There are many utilities in the Google Play Market that provide detailed data on the hardware of the smartphone. One of the most popular and reliable tools is the CPU-Z application or AIDA64.
Once you install and run this application, go to the "Device" or "System" tab, and here you will find a detailed report on the hardware configuration. Look for a line that contains the word "Bluetooth." The application will not only show the protocol version, but can also display the hardware configuration. MAC-Address, status, and other technical parameters, which are especially useful if you want to make sure that the module is working correctly.
⚠️ Note: Only download diagnostic apps from official stores, such as Google Play. Installing programs from unknown sources can lead to personal data leakage or malware infection of the device.
Another effective way is to use Bluetooth testing applications like Bluetooth Scanner or nRF Connect. Although their primary function is to scan surrounding devices, the About menu or scan logs often display a version of the HCI (Host Controller Interface) that matches your phone's Bluetooth version, a more advanced method that requires minimal understanding of technical terms.
Checking through a hidden engineering menu
For more advanced users, there is access to a hidden engineering menu built into the MIUI shell, which is designed to test equipment by engineers in the factory, but it also allows users to get in-depth information about the status of communication modules.
Dial ##6484## or ##4636##. If the first command doesn't work (as codes may vary depending on the firmware version), try the second. In the menu that opens, select "Bluetooth" or "Bluetooth Test." Here you can see the status of the module, run a device detection test, and, in some cases, see the version of the controller's software.
#6484## is the main code for entering the CIT (Customer Interface Test)
#4636## - Alternative code for the test menuKeep in mind that the functionality of the engineering menu may vary from one Xiaomi model to another. Some devices only display basic status information, without detailing the protocol version, in which case it is not recommended to change any settings in this menu if you are not sure about your actions, as this may affect the operation of the radio module.
☑️ Checking in the engineering menu
Comparison of Bluetooth versions and their features
Understanding the differences between Bluetooth versions helps you assess the potential of your smartphone. Each new version of the standard brings improvements in data speed, range and energy efficiency. For Xiaomi owners, this is especially true, as the company uses different chipsets in its budget and flagship lines.
Below is a table showing the key differences between common Bluetooth versions found in Xiaomi devices:
| Bluetooth version | Maximum speed | Range of action | Key feature |
|---|---|---|---|
| 4.2 | 1 Mbps | 50m | Basic support for BLE |
| 5.0 | 2 Mbps | 200m | Increased range and speed |
| 5.1 | 2 Mbps | 200m | Accurate location determination |
| 5.2 | 2 Mbps | 200m | Improved Audio (LE Audio) |
| 5.3 | 2 Mbps | 240 m | Enhanced stability and security |
If your smartphone is equipped with version 5.0 and higher, you can expect to connect to multiple devices at the same time without significant delay.Older versions such as 4.2 can have difficulty with modern high-quality codecs such as aptX HD or LDAC. This is important to consider when choosing wireless headphones for listening to music in high resolution.
💡
Bluetooth 5.0 is the gold standard for modern smartphones, providing a balance between power consumption and data quality.
Compatibility issues and audio codecs
Often, the question of the Bluetooth version arises for users who can’t connect new headphones or are faced with poor sound quality, because the protocol version is just the tip of the iceberg, and each version has a set of codecs that determine the sound quality.
Xiaomi smartphones with Snapdragon processors usually have a wide range of codecs available, including aptX, aptX HD and sometimes LDAC. MediaTek-based devices also support modern standards, but their implementation may depend on the specific model and firmware version. To check supported codecs, you can use the Bluetooth Codec Changer application (root access required) or see the list in the developer settings.
To access your codec settings, go to Settings → About Phone → Tapping the MIUI Version 7 times to activate the developer menu. Then to Advanced Settings → For developers, find the Bluetooth Audio Codec section. Here you will see a list of available options. If the desired codec is not on the list, then your smartphone or headphones do not support it.
⚠️ Warning: Changing the audio codec in the developer menu may cause the sound to be distorted or completely absent if the connected device does not support the format you have chosen. Return the settings to the default value after checking.
What to do if Bluetooth is not working or is not working properly
Even if you know your Bluetooth version, you may encounter connection issues. On Xiaomi devices, this sometimes happens after a system update or because of software conflicts. First of all, try resetting your network settings. This action will delete stored Wi-Fi passwords and paired Bluetooth devices, but often solves problems with the communication module.
Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. Confirm and restart your smartphone. If the problem is physical damage to the antenna, which happens after falls, software methods will not help, then you should pay attention to the presence of external interference factors, such as a working microwave or crowded Wi-Fi ether.
In rare cases, you need to flash the Bluetooth module, which is only possible in a service center environment using special equipment. However, in 90% of cases, a simple reset or upgrade to the latest available version, which contains security patches and stability improvements, helps on Redmi and Poco smartphones.
💡
If the audio in your wireless headphones is interrupted, try turning off the Absolute Volume feature in your Bluetooth settings, which often solves the problem of de-synchronizing volume on Xiaomi devices.