How to find out the Bluetooth version on the Xiaomi Redmi Note 7 smartphone: all ways

Xiaomi Redmi Note 7 is still one of the most popular budget smartphones due to its balanced characteristics and reliable “iron” base. However, when connecting modern gadgets — headphones TWS, fitness bracelets or car multimedia systems — users often face the question: which version of Bluetooth is supported by their device?

In this article, we’ll break down all the ways you can check the Bluetooth version on the Redmi Note 7, from standard Android settings to hidden engineering menus. You will also learn how to interpret the data, what limitations the Bluetooth 5.0 version (which is installed in this smartphone) imposes, and what to do if your device does not see compatible gadgets. MIUI, This often causes users to receive incorrect information.

Why it’s important to know the Bluetooth version of the Redmi Note 7

The Bluetooth version of the module determines not only the theoretical data transfer rate, but also the practical capabilities of the smartphone:

• 🎧 Sound quality: Bluetooth 5.0 supports aptX codec HD, which provides a sound close to the CD-Quality (24 bits/48 kHz), whereas legacy versions are limited to compressed audio.
• 🔋 Energy consumption: New protocols optimize battery consumption when connecting headphones or fitness trackers. e.g. Bluetooth Low Energy (BLE) 5.0 reduces consumption by 30-40% compared to 4.2.
• 📶 Communication range: In theory, Bluetooth 5.0 operates at a distance of up to 240 meters (in open space), whereas 4.2 is limited to 60 meters.
• 🔄 Accessories Compatibility: Some smartwatches (such as the Xiaomi Watch 2 Pro) require Bluetooth 5.0 to function properly with features like real-time heart rate measurement.

Redmi Note 7 has a chip Qualcomm Snapdragon 660, which supports Bluetooth 5.0. However, due to the features of the firmware MIUI in some regional versions of the smartphone may display outdated information (for example, 4.2). This is not a hardware bug, and software bug that can be avoided — we will talk about this later.

⚠️ Note: If you plan to use the Redmi Note 7 with a car radio, check its Bluetooth version requirements.Some multimedia systems (for example, Toyota or Volkswagen 2020).+ Refuse to connect to devices with version below 4.2, even if the actual version of the module is 5.0.

Method 1: Checking through standard MIUI settings

The easiest way is to look at the settings menu, but there's a caveat: depending on the version of MIUI, the data you see may be different.

1. Open the Settings app (the gear icon on the home screen).
2. Go to the About Phone section (usually at the bottom of the list).
3. Tap on the item All characteristics or General information (the name depends on the firmware version).
4. Scroll down to the Network or Wireless Networks block – there should be a Bluetooth version string.

If you see 4.2 instead of 5.0, don’t panic, it’s a well-known MIUI bug. The real version of the module is determined by hardware, not the software shell. To make sure of this, use alternative verification methods (described below).

Make sure your smartphone isn’t fake (check IMEI on Xiaomi’s official website)

Update MIUI to the latest version via Settings → System Update

Use third-party applications for diagnosis (method 3)

Try to activate the engineering menu (method 4)-->

Method 2: Using USSD code for diagnosis

Redmi Note 7 has a hidden service code that displays details about communication modules, including Bluetooth.This method works on most Xiaomi devices, but requires caution - do not enter other codes unless you are sure of their purpose!

Instructions:

1. Open the phone (calling) application.
2. Enter the combination: ##4636###.
3. In the menu that opens, select Phone Information (or Phone Information).
4. Scroll down to the Bluetooth block – there will be a Bluetooth version string.

If the code doesn't work (rarely, but it does), try the alternative: ##232338##. MAC-The address of the Bluetooth module and its version. MIUI This code can redirect to the Wi-Fi menu — that’s okay, just close it and try another way.

Standard settings of MIUI

Service USSD-code

Application side (AIDA64, CPU-Z)

Engineering menu

Never checked.-->

Method 3: Third-party applications for diagnosis

If the system methods are not clear, specialized utilities will come to the rescue, they read data directly from the hardware, avoiding possible MIUI errors.

How to use (in the example of AIDA64):

1. Install the app from Google Play.
2. Open it and provide access to device information (when a request appears).
3. Go to System → CIQ (or System → CIQ in English).
4. Find the Bluetooth block, and there will be a Version string with the current data.

⚠️ Note: In some versions AIDA64 Bluetooth information can be duplicated in the Devices section → Device status. If the data in these blocks differ, trust the partition. CIQ — It reads information directly from the chipset.

Method 4: Engineering menu (for power users)

This is a method that suits those who are ready to dive into technical details. The Engineering Mode provides access to the Redmi Note 7's low-level settings, including diagnostics of the Bluetooth module. Beware: the wrong actions here can disrupt wireless interfaces!

Step-by-step:

1. Open the Phone app and enter the code: ##36446337###.
2. You'll be taken to Engineer Mode. Go to the Hardware Testing tab.
3. Select Bluetooth (can be called BT or RF Test).
4. In the menu that opens, look for the Bluetooth Version or BT Chip Version bar.

In the engineering menu, you can also test the operation of the module:

• 🔍 Start scanning of nearby devices (Device Scan).
• 📡 Check signal strength (RSSI Test).
• 🔄 Turn on/off the module manually (BT Power Control).

Method 5: Analysis of technical documentation and specifications

If the software methods do not give a clear answer, you can refer to official sources. Xiaomi Redmi Note 7 is equipped with a chipset Qualcomm Snapdragon 660, which, according to the manufacturer's documentation, supports Bluetooth 5.0.

• 📄 Qualcomm official website: Snapdragon 660 spec specifies that the integrated module WCN3990 Compatible with Bluetooth 5.0 and Wi-Fi 802.11ac.
• 🛠️ Disassembly of the device: on the board Redmi Note 7 installed chip WCN3990, wireless.
• 📦 Smartphone box: some regional versions (for example, for the Indian market) indicate Bluetooth on the sticker v5.0.

However, there is a caveat: the software implementation in MIUI may limit some Bluetooth 5.0 features.

• 🔊 Audio Codecs: Despite Support for AptX HD at the chipset level, in MIUI By default, only the basic can be activated. SBC.
• 📡 Range: real range rarely exceeds 30-50 meters due to firmware limitations.
• 🔋 Energy Saving: Bluetooth Low Energy can be unstable when used GPS.

💡

If you want all the features of Bluetooth 5.0 (for example, for professional headphones), consider installing custom firmware like LineageOS or Pixel Experience.

Frequent problems and their solutions

Even if you know the Bluetooth version, Redmi Note 7 users may have trouble connecting devices. Let's look at typical scenarios and how to fix them.

Problem 1: The smartphone can’t see headphones or speakers

Causes and solutions:

• 🔄 Reboot the module: Turn off Bluetooth in settings, restart the phone, then turn on again.
• 📱 Reset Network Settings: Go to Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.
• 🔋 Low Accessory Charge: Some devices (such as AirPods) don’t appear on the list if their battery is under 10%.
• 🛠️ Accessory firmware update: check if there are updates for your headphones through a branded app (e.g. Mi Home for Xiaomi devices).

Problem 2: Communication is interrupted or sound is missed

This is a problem for Redmi Note 7 when using Bluetooth 5.0 in jamming conditions.

• 📶 Change the codec: in the developer settings (Settings) → The phone. → Version. MIUI — Tap 7 times) activate the option to Turn off the absolute volume of Bluetooth.
• 🔇 Turn off Wi-Fi: If you don’t use the internet, deactivate Wi-Fi – it can interfere at 2.4 GHz.
• 🔄 Reconnect the device: remove the gadget from the list of conjugates and connect it again.

⚠️ Note: If the sound problems only occur in a particular app (like YouTube or Spotify), clear its cache in the settings (Settings) → Annexes → [Title of the annex] → Warehouse → Clear the cache).

Problem 3: Incorrect display of the Bluetooth version in the settings

As mentioned, MIUI sometimes shows Bluetooth 4.2 instead of 5.0. This is not a hardware problem, but an interface bug.

1. Update MIUI to the latest version via Settings → System Update.
2. If there is no update, reset your phone to factory settings (Settings → System → Resetting).
3. Use the AIDA64 or engineering menu to confirm the real version.

💡

If all methods show Bluetooth 4.2, but the Snapdragon 660 chipset is guaranteed to support 5.0, it is 100% a software bug MIUI.

FAQ: Answers to popular questions