The Xiaomi Redmi Note 6 Pro is a popular smartphone released in 2018, but still in active use due to its balanced characteristics. One of the key modules of the device is Bluetooth, which depends on the version of which compatibility with headphones, smart watches, automotive systems and other gadgets depends. However, the manufacturer does not always indicate this information in the public domain, and in the MIUI interface, the data on the version of the protocol is hidden deep.
In this article, you will find 3 proven ways to identify the Bluetooth version on the Redmi Note 6 Pro, from standard settings to hidden engineering menus. We will also discuss why it is important to know this information, how it affects the operation of devices, and what to do if your smartphone does not support the desired version of the protocol. All methods are tested on MIUI 10-14 and do not require root rights.
Why it’s important to know the Bluetooth version of Xiaomi Redmi Note 6 Pro
The Bluetooth version not only defines the data transfer speed, but also the functionality of the connected devices.
- 🎧 Bluetooth 4.0-4.2: Supports basic headphones and fitness bracelets, but can slow down when transmitting high-quality music.
- 🚗 Bluetooth 5.0+: It is necessary for stable work with automotive multimedia systems (Android Auto, CarPlay) and low-power devices (for example, smart home sensors).
- 🎮 Bluetooth 5.2 adds support LE Audio and improved synchronization for gamepads and wireless speakers.
The Redmi Note 6 Pro is equipped with Bluetooth 5.0 (officially specified), but in practice, the version can vary depending on regional firmware or hardware revisions. For example, Indian versions sometimes received modules with reduced functions to save costs. If you plan to connect modern gadgets (for example, Xiaomi Buds 4 Pro or Amazfit GTR 4), it is better to specify the version of the protocol in advance.
⚠️ Note: Some accessories manufacturers indicate minimum Bluetooth requirements in documentation. WH-1000XM5 Bluetooth 5.0 is required to function LDAC (high-quality).
Method 1: Checking through standard MIUI settings
The easiest method is to use the built-in MIUI tools, but in the latest versions of the shell, data about the Bluetooth version is hidden and you need to “fish” it through the service information.
Follow the instructions:
- Open the Settings app (cog icon).
- Go to the About Phone section (usually at the bottom of the list).
- Tap on All Features (or General Information, depending on the MIUI version).
- Scroll down to the Network or Wireless Networks block – a Bluetooth string with the version can be displayed here.
If you don’t have a version, try an alternative route:
- In Settings, select Connections and Sharing → Bluetooth.
- Activate Bluetooth and connect any device (e.g. headphones).
- Once connected, tap the device name in the list – sometimes the protocol version is displayed in the connection details.
Check out MIUI updates in Settings → About Phone → System Update
Restart your phone and try again.
Make sure Bluetooth is on and not in power saving mode-->
On the Redmi Note 6 Pro with MIUI 12+, this method works ~60% of the time. If data is not available, move on to the next method.
Method 2: Using Third-Party Applications
If the standard settings don't show the Bluetooth version, we'll have specialized utilities to help, and we recommend two proven applications:
| Annex | Download link | Pluses | Cons |
|---|---|---|---|
| AIDA64 | Google Play | Shows full hardware information, including revision of Bluetooth module | Paid version for advanced functions |
| DevCheck | Google Play | Free, simple interface, exporting data | Maybe they can't recognize custom firmware. |
| CPU-Z | Google Play | Detailed data on the processor and communication modules | The interface is overloaded with technical terms |
Instructions for AIDA64 (the most reliable option):
- Install and open the application.
- Go to the System (or System) section.
- Select CIQ (or Chipset Info)
- Scroll to the Bluetooth block – the version will be listed here (e.g. Bluetooth 5.0, LE).
💡
If AIDA64 displays an unknown version (e.g. Bluetooth 4.9), it could mean that the module supports some of the features of Bluetooth 5.0, but is not officially certified, as found on budget Xiaomi devices.
In DevCheck, the information is in the Hardware → Bluetooth section. Note the Supported features bar – additional protocols (e.g., A2DP, LE) may be specified here.
Method 3: Engineering menu (for power users)
If the first two methods fail, you can use the hidden engineering menu (Engineer Mode), which requires caution, as the wrong actions can disrupt the Bluetooth module.
Instructions:
- Open the phone app and enter the combination: ##4636##
- In the menu that opens, select Phone Information (or Phone Information).
- Scroll down to the Bluetooth block – here you can see the version of the protocol and MAC-address.
If the #4636### combination doesn’t work, try the alternative code for Xiaomi:
##232338##This code opens the Wi-Fi/Bluetooth Test menu, where the Bluetooth section sometimes specifies the version.
⚠️ Warning: Do not change the settings in the engineering menu unless you are sure of their purpose! for example, reset Bluetooth settings (Reset) BT) This will remove all the paired devices.
What to do if the engineering menu is blocked?
How to check the compatibility of Bluetooth devices with Redmi Note 6 Pro
Knowing the Bluetooth version, you can predict whether your smartphone will work properly with a particular gadget.
- 🔊 Headphones and speakers: For AptX or LDAC Bluetooth 5.0 is required. On the Redmi Note 6 Pro, these codecs can work with limitations (for example, without support for aptX). HD).
- ⌚ Smartwatches: Mi Band 7 Pro or Amazfit GTR 4 require Bluetooth 5.0 LE for stable data synchronization.
- 🚗 Automotive systems: Android Auto runs on Bluetooth 4.2+, But for wireless screen projection, you need Bluetooth 5.0.
- 🎮 Gamepads: Xbox Controller or DualSense only connects via Bluetooth 4.2+, But you need 5.0 for minimum delay.
To check the compatibility of a particular device:
- Find the accessory manufacturer's website section Technical characteristics (or Specifications).
- Note the Bluetooth Version string or Communication Protocol.
- Compare it to the version of your Redmi Note 6 Pro. If the accessory version is higher (e.g. 5.2 vs 5.0), it will work, but it is possible without some features (e.g. LE Audio).
Bluetooth 4.2
Bluetooth 5.0
Bluetooth 5.1 or newer
I don't know. I haven't checked.-->
Frequent Bluetooth issues on Redmi Note 6 Pro and their solutions
Even if the Bluetooth version meets the device’s requirements, Redmi Note 6 Pro users sometimes experience connectivity issues.
| Problem. | Possible cause | Decision |
|---|---|---|
| The device does not find headphones | Bluetooth profile conflict or outdated firmware | Reset Bluetooth settings in Settings → Connections → Bluetooth → ⚙️ → Reset |
| The sound is interrupted or slowed down. | Low protocol (4.2) or Wi-Fi interference | Turn off Wi-Fi or go to Bluetooth 5.0 (if supported) |
| The microphone in the headset is not working. | HFP (Hands-Free Profile) Incompatibility | Try to connect the device in Sound Only (A2DP) mode. |
| Fast battery discharge when using Bluetooth | Active LE Scan (Search for devices in the background) | Turn off Visibility for everyone in Bluetooth settings |
If problems persist, check:
- 📱 Version MIUI: Update the firmware through Settings → The phone. → Update of the system in older versions (e.g, MIUI 10) there were bugs with Bluetooth 5.0.
- 🔄 Regional firmware: Indian versions of Redmi Note 6 Pro sometimes disabled features LE Audio. Refuse the phone to the global version.
- 🛠️ Hardware malfunctions: If Bluetooth is not turned on at all, the module may be damaged (a common problem after falls or moisture hits).
💡
The Redmi Note 6 Pro with MIUI 12.5+ has dual Bluetooth connectivity (for two pairs of headphones at the same time), however, it only works on Bluetooth 5.0 and can cause audio delays.
Alternative methods (for advanced users)
If none of these methods worked, you can try more complex options, which require technical skills and can affect the stability of the system.
Method 1: Reading system logs
Android logs sometimes contain information about the Bluetooth version.
- Install the Logcat app.
- Open the application and enter the Bluetooth string into the filter.
- Turn on/off Bluetooth – the logs will record the type BluetoothAdapter: getProfileProxy() mBluetoothVersion=5.
Method 2: ADB-team
If you have access to ADB (for example, via a computer), follow the command:
adb shell dumpsys bluetooth_managerIn the conclusion, find the mBluetoothVersion line - the version will be indicated here.
Method 3: Disassembly of the device
On the Redmi Note 6 Pro motherboard, the Bluetooth module is usually marked. For example, the Qualcomm WCN3990 chip supports Bluetooth 5.0, and the BCM4356 supports 4.2. However, this method requires disassembling the phone and risks voiding the warranty.
⚠️ Attention: Use ADB or disassembly of the device may result in loss of warranty or software failures. Use these methods only if other options have not helped.