Below is the direct link to download the Salora SM505 Stock Firmware (flash file) from GoogleDrive. The downloaded file contains the firmware file only
How to Flash
Step 1: Download and extract the downloaded file on your computer.
Step 2: After extracting you will find the firmware file.
[*] Take a Backup of your personal data before flashing or installing the firmware on your smartphone. As this helps you to recover the personal data whenever any thing wrong happens.