Stage 5: Download and Install Spreadtrum USB Driver and extract Spreadtrum Upgrade Tool on your PC/Laptop.
Stage 6: Download Stock Rom (pac) for your Android device
Stage 7: In the wake of extricating, you will find the file as shown below
Stage 8: Then, open “ResearchDownload.exe”
Stage 9: Once Spreadtrum Upgrade Tool is launched, connect your Android gadget to the PC (ensure your gadget is turn off).
Stage 10: Once your Smartphone is associated effectively to the PC, tap on the Load Packed Button and include the .pac record (stock rom which comes as .pac).
Stage 11: Once you have effectively included the Pac record in Spreadtrum Upgrade Tool, tap on the Start Downloading catch to start the glimmering.
Stage 12: During the blazing procedure your gadget will restart consequently. When blazing is finished, you will have the capacity to see the Green Passed Message in Spreadtrum Upgrade Tool.
Step 13: Now you have successfully flashed your Android Device using Spreadtrum Upgrade Tool. Once your Android Device is successfully restarted, Go to Settings > About Phone > Check firmware.
[*] How to Write IMEI: After flashing the stock firmware on Spreadtrum Device, you may need to flash the IMEI also, for that use WriteIMEI or Read&Write Tool to Flash IMEI on Spreadtrum Devices.