At this time I will share the complete tutorial and how to flash the firmware Symphony W70Q Stock Firmware (flash file) from Mediafire. Firmware contains flash file only.
How to Flash Firmware
Step 1: Download the stock firmware on your computer.
Step 2: Extract the firmware.
Step 3: After extracting you will find the .zip file.
Step 4: Place it in the Phone SD memory.
Step 5: Flash it through the recovery.
[*] Important: Some things might happen like flashing stops when the process runs half or flashing fails before 100% completes, it all happens because some things like your emmc are corrupted, or corrupt firmware files. The solution from me is take it to the service center to avoid further damage. Important warnings you should not ignore before flashing Symphony device, then take a backup of everything as because your personal data will be deleted after flashing the stock firmware.
[*]Note: About stock rom details or Firmware shared on this page is officially launched by a company or official developer that works to help you recover devices such as factory settings. if you ever get a bootloop, software error, update error, hanging and shutdown problems, and other defects related to your device’s operating system will be resolved soon.