Modern users rarely think about the technical characteristics of wireless interfaces until they encounter the problem of connecting peripherals. However, knowing the exact specifications Bluetooth module can be the deciding factor when choosing new headphones, smartwatches or game controllers. For example, if you plan to purchase a headset that supports the aptX HD or LDAC codec, and your phone only supports basic SBC, you will not be able to appreciate the high quality of the sound.
Operating system developers Android often hide this data deep in the system menus, making it inaccessible to the average person glance. Unlike the version of the OS itself, which is easy to find in the “About Phone” section, information about the radio interface requires a deeper dive into the settings or the use of third-party software. This was done intentionally so as not to overload the interface with unnecessary technical information that is understandable only to enthusiasts.
In this article we will analyze all the available methods for identifying the communication protocol version: from simple visual checks in the menu to the use of professional debugging tools. You'll learn how to interpret the data you receive and why version numbers like 4.2, 5.0 or 5.3 are critical to the connection stability and power consumption of your device.
Checking through the standard settings menu
The most obvious, but not always working, method is to search for information in the standard system interface. Smartphone manufacturers have different approaches to filling the “About Phone” section. On some models, especially in the Google Pixel or OnePlussegment, you can find detailed hardware specifications, including the Bluetooth version. However, in budget devices this information is often hidden behind a general description of the characteristics.
To try your luck, go to Settings → About phone → All characteristics (or a similar item). Study the list carefully. If you are lucky, you will see a line Bluetooth with a number, for example, 5.2. In other cases, it may simply say “Yes” or indicate only the profile type. The absence of an explicit version indication in this menu does not mean that the module is outdated - the manufacturer simply did not consider it necessary to display this label on the first screen.
Sometimes useful information is hidden in the section dedicated to wireless networks. Try going to Settings → Connections → Bluetooth and click on the gear icon or three dots in the corner of the screen. The advanced settings of some shells, such as MIUI or One UImay contain a technical summary. If you don’t find the treasured number there, don’t be upset - this is only the first stage of the search, and there are more reliable methods.
⚠️ Attention: The settings interface may differ radically depending on the version of Android and the manufacturer’s proprietary shell. What is on a “pure” Android can be moved or deleted in custom firmware.
Using the engineering menu and hidden codes
A more advanced method of accessing technical information is using the engineering menu. This is a hidden section of the system intended for testing equipment by engineers at the factory. It is accessed through a set of special USSD codes in the Phone application. This method allows you to see real version of the chipwhich the radio module uses, bypassing the superficial interface settings.
For most devices on processors MediaTek the code works ##4636##. After entering the last character, the menu should open automatically. You need to select “Phone Information” or “Phone Information”. Scroll down to the Bluetooth section. It often indicates not only the power-on status, but also the protocol version, as well as the device address (MAC address). If the code does not work, try alternative combinations specific to your brand.
Owners of processor-based smartphones Qualcomm Snapdragon can try the code ##8351## to enable logs or ##8350## to disable them, which sometimes opens up access to additional diagnostic tabs. It is also worth checking the code #0#, popular on devices Samsung, which runs a general test of the equipment, although detailed information about BT is rarely displayed there.
What to do if the codes do not work?
Many telecom operators and manufacturers block access to the engineering menu in the latest firmware versions for security reasons. If typing the code does not give anything or says “code is invalid,” then access is denied at the system or provider level. In this case, proceed to using third-party applications.
Be careful when changing any settings inside the engineering menu. Accidentally changing the preferred network type or re-calibrating sensors can lead to unstable communications or even loss of signal. Your goal is only to view information, therefore do not press the “Set” or “Reset” buttonsif you are not 100% sure of their purpose.
Third-party diagnostic applications
The most universal and convenient way for the average user is to install specialized utilities from the store Google Play. These applications collect data from system files and APIs, presenting it in an understandable way. They do not require root access and show not only the Bluetooth version, but also supported profiles, codecs and the current connection status.
One of the leaders in this category is the application Bluetooth Version Checker. It's lightweight, free, and shows results immediately after launch. Another powerful tool is AIDA64 or CPU-Z. These comprehensive diagnostic utilities provide comprehensive information about all smartphone hardware. In the “Network” or “Radio” section you will find a detailed report on the wireless modules.
- 📱 Bluetooth Version Checker: A specialized application that focuses exclusively on the protocol version and profile compatibility.
- 🛠️ AIDA64: A professional tool for complete system diagnostics, showing details of sensors, batteries and radio modules.
- 📡 Device Info HW: A utility that often displays information about codecs and Bluetooth versions where other applications fail.
After installing any of these applications, launch it and wait for the data to be collected. This usually takes a few seconds. Find the tab related to connection or network. The version will be indicated there, for example, “Bluetooth 5.1 LE”. Pay attention to the prefix LE (Low Energy) - it means support for an energy-efficient mode, important for fitness bracelets and beacons.
Analysis via the terminal and ADB commands
For those who prefer full control and do not trust third-party applications, there is a method of checking via the command line. This method requires enabling USB debugging mode and having a computer with drivers installed. ADB (Android Debug Bridge). This is the most accurate method, since it requests information directly from the system kernel.
First, activate developer mode on the phone: go to Settings → About phone and quickly press 7 times on the “Build number” item. Then, in the “For Developers” menu that appears, enable “USB Debugging.” Connect your smartphone to your PC with a cable and open the command line on your computer in the ADB tools folder.
Enter the following command to get a list of all system properties, filtering only those related to Bluetooth:
adb shell getprop | grep bluetoothIn the command output, look for lines like [ro.bluetooth.version]: [5.2] or similar variations. You can also use the command adb shell dumpsys bluetooth_manager, which will display a detailed log of the Bluetooth manager status, including the HCI (Host Controller Interface) version. This method is difficult for a beginner, but is guaranteed to give the correct result.
⚠️ Attention: To work with ADB, you need to install device drivers on your computer. If the command
adb devicesdoes not show your smartphone or says “unauthorized”, check the phone screen and confirm permission to debug from this computer.
If you do not have a computer at hand, there are terminal applications directly on Android (for example, Termux). You can enter a command into them getprop | grep bluetooth without connecting to a PC, but this may require superuser rights (Root).
Decoding versions and their impact on operation
Understanding what exactly the version numbers mean will help you assess the potential of your device. Each new specification brings improvements in data speed, range and power efficiency. For example, moving from version 4.x to 5.0 doubled the transfer speed and quadrupled the range.
Versions with index LE (Low Energy)starting with 4.0 are critical for wearable electronics. They allow devices like smartwatches to last for weeks on a single charge while being constantly connected to the phone. Newer versions, such as 5.2 and 5.3, have introduced improved encryption mechanisms and connection stability in conditions of strong interference.
| Bluetooth version | Year of release | Key features | Maximum speed |
|---|---|---|---|
| 4.2 | 2014 | Improved protection, IPv6 support | 1 Mbit/s |
| 5.0 | 2016 | Increased range and speed (2x) | 2 Mbit/s |
| 5.1 | 2019 | Precise location determination (AoA/AoD) | 2 Mbit/s |
| 5.2 | 2020 | LE Audio, improved encryption | 2 Mbit/s |
| 5.3 | 2021 | Increased resistance to interference | 2 Mbit/s |
If you see version 4.0 or 4.1 in the specifications, this is a signal that the smartphone belongs to previous generations. Modern high-bitrate wireless headphones may not be able to connect or may experience audio delays. For comfortable use of current gadgets today, it is desirable to support the standard Bluetooth 5.0 and higher.
The Bluetooth version determines not only the communication range, but also the available audio codecs. Older versions do not support modern audio compression formats, which directly affects the quality of music in wireless headphones.
Compatibility issues and frequently asked questions
Even with a modern version of Bluetooth, users may encounter connection problems. Often the reason lies not in the protocol version, but in incompatible profiles or outdated peripheral device drivers. If your phone has Bluetooth 5.3 and your headphones have Bluetooth 4.2, they should still work together thanks to the backwards compatibility mechanism, but the functionality will be limited to the capabilities of the older version.
Sometimes the system displays incorrect information after a major firmware update. In such cases, resetting the network settings helps. Go to Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings. This action will delete all saved device pairs, but can correct software errors in the operation of the radio interface.
⚠️ Attention: Resetting network settings will delete all saved Wi-Fi passwords and paired devices. Make sure you remember passwords for important networks before performing this procedure.
☑️ Diagnosing connection problems
In conclusion, it is worth noting that using software methods you can only find out the protocol version that the software stack supports. The physical capabilities of the antenna and chip may be higher, but are limited by the manufacturer's firmware. Therefore, always rely on the official specifications of the model on the vendor’s website if the data from the system seems suspiciously low to you.
Can an Android update increase the Bluetooth version?
No, the Bluetooth version is determined by the hardware chip soldered on the board. Updating the operating system can improve stability or add support for new codecs, but cannot change the physical version of the protocol (for example, turn 4.2 into 5.0).
Why do different applications show different versions?
Different applications use different methods for requesting data. Some read system properties, others query the driver directly. Sometimes a reading error occurs. The most accurate method is considered to be through ADB or specialized utilities like AIDA64.
Does the Bluetooth version affect the Internet speed?
Bluetooth itself does not affect the speed of the mobile data (4G/5G), since these are different radio modules. However, when simultaneously actively transmitting large amounts of data via Bluetooth and Wi-Fi, radio interference may occur, since both standards operate in the 2.4 GHz band.
What is Bluetooth LE and why do you need it?
Bluetooth Low Energy (LE) is a technology that allows devices to transmit small packets of data with minimal energy consumption. This is the standard for fitness trackers, smart scales and beacons, which must operate on a small battery for months.