On this page, you will find the Download link of Sansui M2 Firmware (flash file), which can be flashed on the device to fix it without the need of any other software.
Sansui M2 Firmware comes as a zip file and is of 3 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 M2 Firmware is V7.0 and it was released on 26/11/2015.
File Name: Sansui_M2_V7.0_26112015.zip
Alternate Name: Sansui M2 V7.0 26112015
File Size: 3 MB
Released date: 26/11/2015