Flash .Pac Stock Rom on Android Smartphone
Step 2: Download Stock Rom (.pac) for your Android Device.
Step 4: Now, open reseachdownload.exe.
Step 5: Once researchdownload Tool is launched,
make sure your device is switch off.
uncheck all , and flash only userdata fdl1 & 2 already selected
CHECK BELOW IMAGE
Step 7: Once you have successfully added the .Pac file
click on the Start Downloading button to begin the flashing.
Step 8: During the flashing process your device will restart automatically. Once flashing is completed, you will be able to see the Green Passed Message in researchdownload tool
Step 9: Now you have successfully flashed your Android Device using researchdownload Tool.