SPD Flash Tool - Download SPD Upgrade Tool For Windows

How to use Research Download tool / Upgrade Download tool

The steps below explain how to use research download tool or upgrade download tool to flash a Spreadtrum PAC file

1.See the video tutorial below or @ https://youtu.be/bJgVk3GTKPc
2.Open the Research download tool > bin folder
3.Launch ResearchDownload.exe

4.Click on the Load Packet icon (top left corner)

5.In the window that pops up, navigate to the location of the .pac file, select it then click Open

6.The pac file should now be loaded (its name should appear at the top)

7.Click the Settings Icon (top left corner)

8.In the box that pops up, untick any item(s) you do not wish to flash then click OK. Ignore this step if you wish to flash all files

9.Click the Start downloading button

10.You should see Waiting.... under the Progress bar

11.Switch off the phone (still with battery inside) then connect it to the PC via USB cord (note that you might need to hold the volume decease button while connecting to PC on some phones) and flashing should begin. DO NOT interrupt

12.Once flashing is complete, you'll see Passed

13.Click on the Stop downloading icon then disconnect the phone from PC and boot

Important Notice

• This tool is for Spreadtrum chips only. It will not work on any other chipset
• This tool only flashes firmware in .pac format. If the firmware you downloaded is in zip format then unzip to view its content. If the content isn't a pac file (but each partition's files) then you need to convert to a pac file in order to flash using this tool
• Dumps made using Infinity Chinese Miracle II SPD are usually in .pac.sc format and can't be directly flashed using this tool. You'll need to convert the Infinity CM2 SPD pac.sc to pac format
• For some phone models, you might need to hold the boot key (could be either volume up or volume down) throughout the flashing process. This is to enable the flashing to continue in the face of a connection-disconnection cycle
• If you wish to flash selected partitions (using Research Download tool) , fdl 1 & fdl 2 are required to be flashed also.
• You should only flash a pac file for your phone model and build number / variant. Flashing anything else could brick your phone
• Do Not interrupt the flashing process as this could brick the device. If flashing somehow gets interrupted, take out and re-insert the battery then retry flashing
• This tool was created by Spreadtrum Commuications Inc. so credits to them for the tool