How to update the firmware headphones Xiaomi Air 2S: official and alternative ways

Xiaomi Air 2S headphones (TWSJBQ02JY) remain popular for their balanced sound and convenience, but over time, the device’s performance can deteriorate, with delays, connection problems, or fast battery discharge, and 80% of these problems are solved by updating the firmware, a procedure many users are afraid to do on their own.

In this article, you will find the latest ways to update the Air 2S into 2026 From the official method through the Mi Fit app to manual updates via PC, we will also analyze common errors (e.g. code). 10004 Or endless loading, and we'll give you recommendations for resetting your headphones after a failed upgrade. Android/iOS.

Why do I need to update Air 2S?

The firmware in the headphones Xiaomi Air 2S is responsible not only for the basic functions, but also for:

• 🎵 Sound quality: correcting distortions at high frequencies, improving noise cancellation (ANC).
• 🔋 Power management: battery consumption optimization (according to user feedback, after upgrading to version 1.7.0.3, the operating time increased by 15 times%).
• 📶 Connection stability: eliminating communication breaks with the phone (especially important for iPhone owners).
• 🛠️ New features: for example, support LC3-codec (introduced in firmware 1.4.0.0) for better synchronization with Android 12+.

According to service centers, 3 out of 10 Air 2S warranty calls involve outdated firmware that users haven’t updated in years, taking no more than 10 minutes to process, and the risk of headphones getting bricked up when you do the right thing is zero.

Preparation for the update: 5 mandatory steps

Before starting the procedure, make sure that all the conditions are met:

Headphone and case charge ≥ 50%|Remove headphones from the list of conjugated devices in Bluetooth|Install the latest version of Mi Fit (at least 5.6.0)|Connect your phone to stable Wi-Fi (to download firmware)|Close background apps, especially instant messengers-->

Pay special attention to battery power. If the headphones become depleted during the upgrade, this can lead to loss of communication between the left and right module (so-called "Stereocouple disconnect"), in which case you will need to reset via Mi Fit or flashing manually.

⚠️ Attention: If your Air 2S If you have purchased them in China (the domestic version), you can't update them through the global Mi Fit app, and if you do, use the PC method or the Mi Home alternative software).

Method 1: Update via Mi Fit (official method)

This is the easiest and most recommended method, which is suitable for 95% of users, and the instructions are relevant for Mi Fit versions 5.6.0 and higher.

1. Open Mi Fit and go to Profile → Xiaomi Air 2S.
2. Click on the three dots in the top right corner and select Firmware Update.
3. If the update is available, a Download button will appear. Press it and wait for the download to be completed (the file weighs ~10-15 MB).
4. Place both headphones in the case, close the lid, and plug the case into the charger. Click Update in the app.
5. It's going to take 5 to 7 minutes, and the headphones are going to flash white and red, which is normal. Don't open the case or turn off the charger.

After a successful update, the headphones will automatically restart and a notification will appear in the app. Check the firmware version in the About Device section - it should match the latest available on the Xiaomi website.

Method 2: Manual update via PC (for power users)

This method will be required if:

• 🔄 Official updates via Mi Fit are not available for your region.
• 💻 Headphones “hang” after a failed update.
• 📥 You want to revert to the previous version of the firmware.

For manual updates you will need:

• 🖥️ Windows computer 10/11 macOS.
• 🔌 Type-C Cable for Case Connection.
• 📁 Firmware in.bin format (you can download on the official Xiaomi website or forums like this) 4PDA).
• 🛠️ MiFlash or Fastboot Tools.

Step-by-step:

1. Download and unpack the archive with the firmware. The file name should look like TWSJBQ02JY_V1.7.0.3.bin.
2. Connect the case with the headphones to the PC via cable. Make sure the case is defined as a removable drive (if not, try another cable or USB port).
3. Copy the firmware file into the root case folder (not nested directories!).
4. Disconnect the case from the PC, close the cover and wait for the automatic reboot (earphones will flash red ~3 minutes).
5. After the reboot, check the firmware version through Mi Fit.

⚠️ Warning: If the headphones don't turn on or sync after manually updating, perform a hard reset: press the button on the case for 15 seconds until the indicator flashes red and white.

Common Update Errors and How to Fix Them

Even when you follow the instructions, users have problems.

Error 10004: "I couldn't connect to the headphones"

Reasons:

• 📱 Headphones connected to another device via Bluetooth.
• 🔄 In the case, there is a cache from the previous update.
• 📵 Problems with the phone’s Bluetooth module (especially on Android 13 devices)+).

Decision:

1. Remove the headphones from the list of conjugated devices on all gadgets.
2. Reset the case (click the button for 10 seconds).
3. Reboot your phone and try again.

Headphones are not synced after the update

This happens if the left-right earphone connection fails during the update, and you can restore the pair as follows:

1. Place both headphones in the case and close the lid.
2. Press and hold the button on the case for 20 seconds until the indicator flashes red and white.
3. Connect the headphones to the phone again via Mi Fit.

💡

If the sound is quieter after the update, check the equalizer settings in Mi Fit. Often resetting to factory settings (in the Sound section) solves the problem.

How to roll back the firmware to the previous version?

A firmware rollback may be necessary if the new version causes problems, such as a deterioration in the quality of the microphone or interference with music.

1. Download the desired firmware version (e.g. 1.4.0.0) from a trusted source (recommended 4PDA).
2. Connect the case to your PC and copy the firmware file, renaming it fw.bin.
3. Turn off the case, close the lid and wait for the reboot (up to 5 minutes).

Important: rollbacks are only possible on versions that were previously installed on your headphones, and installing older firmware than the one that came out of the box can lead to unstable work.

💡

Before rolling back the current firmware: copy the file fw_backup.bin It's a case on a PC, and it'll help you recover your headphones in case you make an error.

Frequently Asked Questions (FAQ)