Modern smartphones like the Xiaomi Redmi Note 8 are complex devices where each communication module plays a critical role in comfort. Users often face the need to know the exact specification of a wireless interface, especially when buying new accessories or diagnosing connection stability issues. Determining the exact version of the Bluetooth protocol becomes an important step in understanding why headphones may not work properly or why file transfer speeds are limited.
Unlike the Android or MIUI version, Bluetooth chip version data is often hidden from the average user in the depth of system settings. The standard About Phone menu rarely contains this technical detail, which forces gadget owners to look for alternative ways to get information. For owners of Redmi Note 8, there are several proven methods to look under the hood of the system and get exhaustive data about the radio module.
In this article, we will take a look at all the available methods, from simple apps from Google Play to advanced methods through debugging via USB. You will learn how to interpret the data obtained and why version 5.0 differs from 5.1 or 5.2 in terms of power consumption and sound quality. Understanding these nuances will help you to maximize the capabilities of your smartphone.
Why You Need to Know the Exact Version of Bluetooth
Many users ignore the specifications of wireless modules until they encounter compatibility issues. However, knowing the version of the communication protocol allows you to know in advance what functions will be available when connecting external devices. For example, support for high-resolution codecs or low-latency mode depends on the capabilities of the chip and the software version.
If you’re planning to buy a wireless headphone, gaming controller or smartwatch, checking the Redmi Note 8 specs will ensure there are no unpleasant surprises. Newer versions of the protocol provide not only better speeds, but also significantly less power consumption, which is critical for the smartphone’s autonomy during the day.
- 🎧 New versions support advanced codecs like aptX HD or LDAC, which are not available under the old standards.
- ⚡ Power efficiency: Protocols since version 5.0 consume significantly less power when transmitting data in the background.
- 📡 Range and stability: Increased data rate and improved interference protection algorithms are common in the latest versions.
Also, knowing the version helps in troubleshooting. If you see that a device supports Bluetooth 5.0 but behaves like 4.2, it may indicate a software failure or driver problem, in which case accurate diagnosis allows you to quickly find a solution in specialized forums or contact the service center with a specific problem.
⚠️ Note: Do not confuse the Bluetooth version with the firmware version MIUI. Updating the operating system does not always mean automatically updating the firmware Bluetooth module.
Use of specialized applications for diagnostics
The easiest and most affordable way for the average user is to install a third-party app from the Google Play store. There are many utilities that can read system information and output it in a readable way.
One of the most popular tools is the Bluetooth Version Checker app or similar system monitors like the one that is used in the system. AIDA64 or CPU-Z. Once installed, you just run the program and go to the network or device section, and here you'll see not only the protocol version, but also the protocol version. MAC-Address, connection status and list of supported profiles.
To obtain the most accurate data, it is recommended to use applications that read information directly from system logs or through the Android API.
- 📱 AIDA64: Provides comprehensive information about all components of the smartphone, including details of the radio module.
- 🔍 Device Info HW: A specialized application that often shows more detailed data on iron than competitors.
- ⚙️ Bluetooth Scanner: Not only allows you to see the version, but also analyze the signal quality and supported services.
Using such utilities makes life much easier if you need to quickly check the device before buying accessories in the store. However, if applications show conflicting data or you want to access raw data, it is worth turning to more advanced methods.
Checking through the Xiaomi Engineering Menu
Xiaomi smartphones, including the Redmi Note 8, have a hidden engineering menu designed to test hardware, accessed through a set of code in the Phone app, which allows you to see the real state of communication modules without installing additional software.
To enter the diagnostic menu, you need to dial ##6484##. Once you enter the last digit, the CIT (Customer Integration Test) interface will open. Here are many tests for different components: screen, speakers, sensor and, of course, wireless modules. Find the item associated with Bluetooth, usually called the "Bluetooth test" or "BT".
Dialer: ##6484###
Select: Bluetooth Test
Press: Start TestThe test often displays the firmware version of the Bluetooth chip, which is the most reliable way to know which microcode is currently installed on your device, and if the test is successful, the system will also confirm the module's performance.
☑️ Checking in the engineering menu
⚠️ Warning: Be careful in the engineering menu. Do not change settings that are not sure, as this may lead to improper operation of the radio module or loss of warranty.
Using ADB to obtain detailed information
For advanced users who are not afraid of the command line, the ADB (Android Debug Bridge) method provides the deepest level of access to system information, which allows you to get raw data directly from the device drivers, bypassing the limitations of the standard Android interface.
First, activate the developer mode on Redmi Note 8. To do this, go to Settings → About Phone and press 7 times on MIUI Version. Then, in the “Additional” → “Development by USB” menu, turn on “Debugging by USB.” Connect the phone to your computer and execute a command to get Bluetooth logs.
adb shell dumpsys bluetooth_managerThis command will output a vast list of parameters. Look for strings that contain Local Name, Address, and most importantly, Version or Subversion. This is where the exact revision of the chip is often hidden. Alternatively, you can use the adb shell getprop | grep bluetooth command, which will filter only the properties associated with bluetooth.
What if the ADB can’t see the phone?
The advantage of ADB is that it works on any Android device and is independent of the MIUI shell. This is especially useful if you have reflashed the phone on a custom build or are using a global firmware version on a Chinese device.
Analysis of system logs and configuration files
Another way that is available to users with Root rights or through ADB is to analyze system configuration files. In Android, information about supported features and protocol versions is often stored in build.prop files or in kernel logs. Xiaomi Redmi Note 8 is characterized by the use of Qualcomm chips, information about which is logged in detail when downloading.
Using a file manager with access to the system partition or the command adb shell dmesg | grep -i bluetooth, you can find lines indicating the initialization of the chip. These lines often mention the version of HCI (Host Controller Interface), which corresponds to the version of the Bluetooth standard. For example, HCI Version 10 corresponds to Bluetooth 5.0, and Version 11 to Bluetooth 5.1.
| HCI version | Standard Bluetooth | Main improvements |
|---|---|---|
| 9 | 4.2 | Improved data protection, LE |
| 10 | 5.0 | 2x speed, 4x range |
| 11 | 5.1 | Direction Search, Improved GPS |
| 12 | 5.2 | LE Audio, improved power consumption |
This method requires some technical knowledge to correctly interpret logs, but it gives a 100% guarantee of accuracy. You see exactly what the hardware says, not what the marketing department decided to write in the specifications.
💡
Save the dmesg log to a text file on your computer to conveniently search for the right lines through text search, as the amount of information can be very large.
Version comparison: what does the update give?
Understanding the difference between Bluetooth versions helps you assess the potential of your Redmi Note 8. If the device only supports basic 4.2 or 5.0, you won’t be able to take advantage of the latest features, such as connecting to multiple high-quality audio devices at the same time or spatial audio features.
Newer standards also offer better interception protection and smarter power management, and latency is critical for gameplay, which is significantly reduced in versions 5.0 and higher thanks to improved packet protocols.
- 🎮 Gaming: Reducing input delay makes playing shooters or rhythm games more responsive.
- 🎵 Audio: Support for aptX Adaptive codecs allows you to dynamically change bitrate depending on the quality of the signal.
- 🔋 Battery: Smart data planning allows the smartphone to stay in sleep mode longer.
Unfortunately, the iron-level version of Bluetooth cannot be upgraded, but it is stitched into a chip. However, manufacturers can release firmware updates that fix bugs and improve the stability of the existing standard.
⚠️ Note: If Bluetooth is unstable after updating the firmware, try resetting the network settings. This will not delete your personal data, but will return the configuration of communication modules to the factory.