You are about to download the BLB D03 - SC6820_4.4.2_SPD.rar file on your computer. The file comes as a zip package and the file size is approximately 151MB only. It was uploaded on October 23, 2019. It was uploaded by the registered moderator, for firmware247.com.
[*] Take a Backup: If you are going to flash the above Firmware on your BLB D03 device, then take a backup of everything as because your personal data will be deleted after flashing the stock firmware.