On this page, you will find the Download link of Sansui M15 Firmware (flash file), which can be flashed on the device to fix it without the need of any other software.
Sansui M15 Firmware comes as a zip file and is of 4 MB in size. Firstly, You need to extract the zip file on your computer and flash it using the flashtool.
The file version of Sansui M15 Firmware is V1.0 and it was released on 2015/09/23.
File Name: Sansui_M15_V1.0_20150923.zip
Alternate Name: Sansui M15 V1.0 20150923
File Size: 4 MB
Released date: 2015/09/23