This tool is especially useful to flash Spreadtrum firmwares in BIN format. This works only for devices with 6820 & 8810 CPU
>DOWNLOAD and Install spreadtrum drivers.
>Download and Extract GPG Dragon
>Launch GPG Dragon
>Click on Spreadtrum Tab
>Under Mobile Option, Select 6280_Android or 8810_Android
>Click the button with 3 dots [...] near C:\Temp_File.bin bar
>Select the pac or bin file you want to flash
>Click Start Button
>You will see Scanning USB Port
>Connect the spreadtrum device you want to flash to PC while holding volume down button
>GPG Dragon will Read the phone info and the pac or bin file info then you will see a message Waiting for your confirmation...
>Tick the partitions you want to flash and select OK (do not untick anything if you want to do full flash)
>You will see a purple progress bar with percentage completed.
>When flashing is complete, you will see a message All Done!
>You can now disconnect the device and reboot.
To remove pattern lock or Google account but dont want to do a full flash, just tick only UserData and flash.