These are the instructions to Flash- Official Firmware, Stock rom or any custom rom using Smart Phone Flash Tool (SP Flash Tool) on Windows Computer.
Requirements: Your Android Smartphone should have at-least 40-50 percent of battery to perform the Flashing Process. Sometimes no need Battery
Flash using Smart Phone Flash Tool
Step 1: Download and install Android USB Drivers on your computer. In case Android USB Drivers are already installed on your Computer then skip this step.
Step 2: Power Off your Android Smartphone and remove the Battery (if it is removable).
Step 4: Download and Extract Smart Phone Flash Tool on Your Computer. After Extracting you will be able to see the following files:
Step 5: Now Open Flash_tool.exe (you will find this from the extracted files in Step#6).
Step 6: Once Smart Phone Flash Tool is launched, Click on the Scatter-Loading Button from the Right.
Step 8: Now, Click on the Download Button to begin the Flashing Process.
Step 9: Now, Connect your Smartphone to the Computer using USB Cable (without battery- if it is removable). After connecting the device to the computer Press Volume Down or Volume Up key, so that your computer easily detect your smartphone.
Step 10: Once Flashing is completed, a Green Ring ball will appear.
Congratulations, Now your Android Smartphone is successfully running the Official Firmware or Stock Rom you have Downloaded.