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This Guide will explain how to flash Spreadtrum devices using Research Download Tool / Upgrade Download Tool.
Flash Pac Stock Rom on Android Smartphone
Requirement:

>PC running Windows OS
>Spreadtrum chipset Mobile phone (i.e Lava A71, Xolo Era 4g etc)
>Spreadtrum Drivers (Download Here)
>Research Download Tool (Download Here)
>Firmware File To Flash (in .pac)

Step 1: Download & Install Spreadtrum USB Drivers on your Computer. If Spreadtrum Drivers is already installed on your pc then proceed to step 2.

Step 2: Download Stock Rom (pac) for your Android Device.

Step 3: Download and extract Spreadtrum Research Download Tool on your computer.

Step 4: Now, open ResearchDownload.


Step 6: Now click on the Load Button and add the .pac file (stock rom which comes as .pac).


Step 7: Once you have successfully added the Pac file in  Research Download Tool, Click on the Start button Downloading button and Connect USB cable to switched off phone.



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 Spreadtrum Upgrade Tool.


Step 9: Remove USB cable and reinsert battery.

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