Modern smartphones use wireless technologies to transmit data, connecting headsets, smart watches and car systems. However, users are often faced with a situation where they need to know exactly the capabilities of their device. Knowing the specific protocol version protocol version
Many manufacturers do not indicate this information in the basic settings menu, hiding technical details from the eyes of the average user. This causes confusion: does your Xiaomi or Samsung work with the latest codecs, does it support multiple device connections at the same time? In this article, we will analyze all the available methods - from simple visual checks to the use of engineering tools.
You should not rely only on the year of manufacture of the phone. Even the flagships of previous years could have different modules depending on the region of delivery. Therefore, the only reliable way is to carry out diagnostics using software or hardware, which will be discussed below.
Checking through standard system settings
The most obvious, but not always working, method is to look into the settings menu. In some shells, such as MIUI or OneUI, information about hardware specifications is placed in a separate section. You need to go to Settings → About phone → All characteristics. Here you can sometimes find a line describing wireless modules.
However, in "clean" Android or stock firmware this information is often hidden. If you do not find an explicit mention of the version, try going to the menu For developers. You can activate it by clicking 7 times on the build number in the About phonesection. Inside the developer menu, look for items related to Bluetooth debugging or logs.
⚠️ Attention: The developer menu contains sensitive settings. Do not change values in sections whose purpose you do not know, this may lead to unstable operation of the wireless modules.
Sometimes the protocol version is indirectly indicated in the name of the chipset model. If the processor is indicated in the characteristics Snapdragon 8 Gen 2, then with a probability of 99% Bluetooth 5.3 is installed there. But this is only an assumption based on the specifications of the chip manufacturer, and not the actual version of the module firmware in your device.
If the settings do not explicitly indicate the version, pay attention to support for LDAC or aptX Adaptive codecs - they are usually only available on Bluetooth 5.0 and higher.
Using specialized applications
The most reliable and easiest way for the average user is to install diagnostic software from the store Google Play. There are many utilities that read information directly from device drivers. The leaders in this niche are applications Device Info HW and AIDA64.
After installing and launching the app, you need to find a section dedicated to the network or sensors. In the application AIDA64 you should go to the Networktab, where the Bluetooth standard and its version will be indicated. The app Device Info HW provides even more detailed information, including MAC address and real-time connection status.
- 📱 Device Info HW: Shows the exact protocol version and the chipset used.
- 🔍 AIDA64: Universal combine for diagnosing all smartphone hardware.
- 📡 Bluetooth Scanner: Allows you to see not only your version, but also the versions of connected devices.
These applications are free and do not require root access for basic diagnostics. They access the system API, which returns up-to-date data about the capabilities of the radio module. This is much more accurate than guessing by the year of manufacture of the smartphone.
Diagnostics via computer and ADB
For advanced users who do not want to install unnecessary applications on their phone, there is a method of checking via a computer. To do this, you will need to enable USB debugging and use the utility ADB (Android Debug Bridge). This method gives access to system logs and device properties.
First, connect the smartphone to the PC with a cable and make sure that the computer sees the device. Open a command prompt or terminal on your computer. Enter the command to get system properties related to Bluetooth. Often the necessary information is hidden in system properties starting with ro.bluetooth.
adb shell getprop | grep bluetoothThe command output may contain lines like ro.bluetooth.version or an indication of the support profile. If the direct version is not specified, you can analyze the connection logs. Start monitoring the logs with the command adb logcat, connect any Bluetooth device and filter the output by the word "Bluetooth". The logs often show information about the negotiated version during pairing.
⚠️ Attention: To work with ADB, you need to install device drivers on your computer. Without the correct drivers, the command
adb deviceswill not show your smartphone.
This method is especially useful if the phone does not turn on normally or is in recovery mode, but access to the shell is preserved. It also allows you to check whether the module version has been changed programmatically in custom firmware.
What to do if ADB does not see the device?
Make sure that USB debugging is enabled in the developer menu. Try a different cable, preferably the original one. On some phones, when connecting, you need to select the “File Transfer” mode and not “Charging Only” in order for a data connection to be established.
Analysis of technical documentation and chipset
If you don’t have a computer at hand, and you don’t want to install applications, you can use the deduction method. Each modern mobile processor (SoC) has strictly defined characteristics, including the version of wireless interfaces. Knowing the processor model, you can determine the Bluetooth version with high accuracy.
For example, processors Qualcomm Snapdragon 7th and 8th series of recent years are almost always equipped with a Bluetooth 5.2 or 5.3 module. Chipsets from the MediaTek series also follow these standards. Exceptions are rare and are usually associated with cheaper models in the budget segment, which may contain old Wi-Fi/Bluetooth combo modules. Dimensity also follow these standards. Exceptions are rare and are usually associated with cheaper models in the budget segment, which may contain old Wi-Fi/Bluetooth combo modules.
| Processor series | Model example | Bluetooth version | Year of appearance |
|---|---|---|---|
| Snapdragon 8 Gen 3 | Galaxy S24 Ultra | 5.3 / 5.4 | 2023-2026 |
| Dimensity 9200+ | Xiaomi 13 Pro | 5.3 | 2023 |
| Snapdragon 778G | Honor 50 | 5.2 | 2021 |
| Helio G95 | Redmi Note 10 | 5.0 | 2020 |
| Snapdragon 660 | Xiaomi Mi A1 | 4.2 | 2017 |
To find out the processor model, just enter the name of your smartphone into any search engine and add the word "specs" or "characteristics". On sites like GSMArena or Kimovil this information is always indicated in the first screen of technical data.
The Bluetooth version is strictly tied to the processor model. If you know the chipset of your phone, you also know the Bluetooth version with an accuracy of 95%.
Comparison of versions and impact on operation
Why do you need to know this number? The difference between Bluetooth 4.2 and 5.3 is colossal in terms of power consumption and speed. Older versions require more power to maintain a connection and have less bandwidth, which is critical for transmitting high-quality audio without compression.
New standards such as Bluetooth 5.0 and above have introduced LE Audio (Low Energy) technology, which allows audio to be transmitted to multiple devices simultaneously with lower latency. If you have a version lower than 5.0, you will not be able to fully use the spatial audio functions or connect to two headsets at once.
- 🚀 Speed: BT 5.0 transmits data 2 times faster than BT 4.2.
- 📏 Range: New versions provide stable communication up to 240 meters in open areas (theoretically).
- 🔋 Energy: Low Energy protocols significantly save battery power on your smartphone and headphones.
It is also important to consider backward compatibility. A smartphone with Bluetooth 5.3 will easily connect to an old speaker with version 2.1, but they will work on the capabilities of the older device. That is, you will not receive the benefits of the new standard if the second link of the chain does not support it.
⚠️ Attention: The range characteristics (up to 200-400 meters) are indicated for ideal conditions in open areas. In an apartment with concrete walls, the real range usually does not exceed 10-15 meters, regardless of the version.
Possible problems and their solutions
Sometimes users complain that the phone does not see the device or the connection is constantly broken. This is often attributed to "legacy Bluetooth", but the problem could be a software glitch or interference. Before changing your phone, you should try resetting your network settings.
Go to Settings → System → Reset settings → Reset Wi-Fi, mobile data and Bluetooth settings. This action will delete all saved pairs and network settings, but often solves problems with the protocol stack not working correctly. After rebooting, try connecting the device again.
☑️ Diagnosis of connection problems
If the problem persists, check if the case is in the way. Metallic or overly thick protective covers can shield the signal from the antenna, which is usually located on the top or bottom of the case. Remove the case and check the connection quality again.
Why doesn’t the phone recognize the new earphone?
Most often the earphone is not in pairing mode. Simply switching on is not enough. You need to hold down the power button or a special button on the headphone body until the indicator blinks (usually blue and red). Only then does it become visible to the smartphone.
Is it possible to update the Bluetooth version with firmware?
No, the Bluetooth version is determined by the hardware chip soldered on the board. A software update (Android) can improve stability or add new codecs, but cannot physically turn Bluetooth 4.2 into 5.0.
Does the Android version affect Bluetooth operation?
Indirectly yes. New versions of Android (12, 13, 14) have improved drivers and support for new encryption standards. On an outdated Android, even with new hardware, some functions may not work correctly due to lack of software support.
What are aptX and LDAC and do I need a new Bluetooth?
These are audio compression codecs. For LDAC to work, Bluetooth 5.0 and higher is desirable, although technically it can work on 4.2 with less stability. If you are an audiophile, having the latest version of the protocol is a must for transmitting Hi-Res audio.
How to check the actual data transfer rate?
Use file transfer applications, for example Send Anywhere or the built-in "Fast transfer" function. Try sending a 1GB file. If the speed stays above 2-3 MB/s, you most likely have version 5.0 or higher. Old versions rarely exceed 1-1.5 MB/s in real conditions.