Note: When you click the links below to download the firmware, it indicates that you have already read and agreed to the Open source licenses.

How to upgrade the M15S：Click here

Updated at 2026-06-30

The following changes and improvements have been made to the FW1.0.8 compared to the FW1.0.7 on M15S:

1. Added a new retro theme “Pod Mode”.

2. Added a new retro theme “Cassette Mode”.

3. Added system equalizer, Auto EQ, and community sharing features.

4. Optimized download speed in FIIO Market.

5. Optimized stability and smoothness of remote control.

6. Fixed an issue of occasional abnormality in Bluetooth transmission.

7.Other performance optimizations and bug fixes.

与 FW1.0.7 相比，M15S 的 FW1.0.8 做了以下更改和改进：

1.新增全新复古主题“Pod模式”

2.新增全新复古主题“磁带模式”

3.新增系统均衡器、Auto EQ及社区分享等功能

4.优化飞傲市场下载速度

5.优化远程控制稳定性及流畅度

6.修复蓝牙发射几率性异常问题

7.其他性能优化和Bug修复

M15S FW1.0.8 firmware download 

Full firmware package: Click here

Updated at 2024-05-17

M15S FW1.0.6 Firmware download:

Incremental firmware package: Click here

Full firmware package: Click here

The following changes and improvements have been made to the M15S in

FW1.0.6:

1. Added new PEQ filter types and compressor sound effects for the system;

2. Added an option of indicator light following screen on/off (can be enabled in

    "Settings-Display-Indicator Light Control" );

3. Fix the issue where nonresponse may occur when pressing the Play button for

    the first time after the Sleep mode was disabled;

4. Fixed the issue where it would not respond to the Play/Pause command by the

    RM3 remote control when playing music on Amazon Music;

5. Fixed the issue where the device may crash in Pure Music mode;

6. Fixed the issue where there was no output for the first screen timeout

    when connected to DK1 PRO;

7. Miscellaneous performance improvements and bug fixes.

Updated at 2023-11-10

M15S FW1.0.5 Firmware download:

Incremental firmware package: Click here

The following changes and improvements have been made to the M15S in

FW1.0.5:

1. Added the remote control function (requires to be used on the latest version of the FiiO Control, V3.14);

2. Added the global PEQ function (PEQ can also work on third-party apps after being enabled);

3. Added the screensaver display function (select the screensaver pattern on Settings- Display-Screen saver);

4. Optimized the logic of indicator light control;

5. Miscellaneous performance improvements and bug fixes.

FiiO Music APP Updates:

1. FiiO Music's new UI is released;

2. Added online feedback for users;

3. Added track information copy function to the song menu button;

4. Optimized the sorting logic under folders;

5. FiiO Labs has added an ID3 editing function to customize song information;

6. FiiO Lab has added new sound effects, which can adjust channel balance, high and low bass enhancement, and stereo expand;

7. FiiO Control has added device firmware push updates and update log functions.

Updated at 2023-05-11

M15S FW1.0.3 Firmware download:

Incremental firmware package: Click here

Full firmware package: Click here

The following changes and improvements have been made to the M15S in

FW1.0.3:

1. Added a new function of iPhone decoding under USB DAC mode (After enabling the iOS devices decoding function on the menu of Settings - USB DAC, the device can be connected to an iPhone/iPad, etc. This function should be disabled when connecting to a non-iOS device);

2. Optimized text misses when switching songs of different sampling rate;

3. Improved the speed of downloading apps in the FiiO application store;

4. Fixed the issue where files in the micro SD card may stutter;

5. Fixed the issue where the light would be blue when connecting to the RM3;

6. Fixed the issue where the playback would fail in the Audible app;

7. Miscellaneous performance improvements and bug fixes.

M15S FW1.0.1 Firmware download: 

Full firmware package:

Click here

Incremental firmware package:

Click here