The official link to free download Symphony H250 Stock Firmware ROM (flash file) .Firmware comes in a zip package, which contains Flash File, Flash Tool. Here you will find all kinds of Symphony firmware (Symphony Original Stock Rom) for all Symphony Smartphones, Tablets, and other devices. feel free to Download Symphony firmware. The latest Symphony Stock Rom (Original firmware) for all Symphony Smartphone. All the following Symphony Stock Rom (zip file) contains original Symphony USB Driver , Flash Tool and the Flash File. After Downloading the firmware.