These are the instructions to flash .Pac Stock Rom on any android Smartphone using researchdownload tool
Remember: Your Android device should have atleast 40-50 percent of battery to perform the flashing process.
Flash .Pac Stock Rom on Android Smartphone
Step 1: Download and Install Spreadtrum USB Driver on your Computer. If in case Spreadtrum Driver is already installed on your computer then SKIP this Step.
Step 2: Download Stock Rom (.pac) for your Android Device.
Step 3: Download and extract RESERCHDOWNLOAD OR UPGRADEDOWNLOAD tool on your computer. After extracting, you will be able to see the following files:
Step 4: Now, open reseachdownload.exe.
Step 5: Once researchdownload Tool is launched,
Step 6: click on the Load Packed Button and add the .pac file (stock rom which comes as .pac).
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