On this page, you will find the Download link of Symphony D25 Firmware (flash file), which can be flashed on the device to fix it without the need of any other software.
Symphony D25 Firmware comes as a zip file and is of 8 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 D25 Firmware is v1 and it was released on 04/10/2016.
File Name: Symphony_D25_11142011.zip
Alternate Name: Symphony D25 11142011
File Size: 8 MB
Released date: 04/10/2016