On this page, you will find the Download link of Symphony M150 Firmware (flash file), which can be flashed on the device to fix it without the need of any other software.
Symphony M150 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 Symphony M150 Firmware is v1 and it was released on 01/17/2016.
File Name: Symphony_M150_01172016.zip
Alternate Name: Symphony M150 01172016
File Size: 3 MB
Released date: 01/17/2016