Install the drivers.
Step 2: Open Flash Tool
Open the Flash Tool. Enter folder named "UPGRADEDOWNLOAD_R2.9.9015". Then enter file named "Bin". There you will see an icon named "UpgradeDownload.exe"
Step 3: Pac Loading
a. Click "Load Packet". New window will appear.
b. Enter "Primo D7 Firmware" folder and select "SW07_ Primo D7 Firmware.pac" file
c. Click "Open"
Step 4: Firmware Upgrade
Step 5: Connect The Handset
After clicking the "Start", press the volume down key of your handset, and connect it to your computer with USB cable. Remember: Before connecting the handset with your computer, you must turn it off. Also notice that the battery has to be kept inserted.
Flash operation will begin, you will see this window:
Step 6: Notification
There will appear "Passed". This means it is successful.
How to Flash
Step 1: Download and extract the stock firmware on your computer.
Step 2: After extracting you will find the SP Flash Tool, Driver and instruction manual.
Step 3: Install the USB Drivers (skip if drivers are already installed).
Step 4: Open the SP Flash Tool and load the Scatter File from the firmware folder.
Step 5: Connect your Smartphone to the computer using the USB Driver.
Step 6: Click on Upgrade / Download Button in the SP Flash Tool to Begin the Flashing.
Step 7: Green Ring will appear at the end of successful Flash.
Important Notes:[*] 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.