BUTTER S7 spd 6820/8810 flash file needed

Sir need BUTTER S 7 FLASH FILE. Restarting again and again with butter logo
Tryed to format but no luck

Analysis of USB port,Please insert phone USB cable.
Internal version: SPRD3
Boot downloaded.
Start boot please wait a moment….
Spreadtrum Boot Block version 1.1
Boot downloaded.
Boot downloaded.
Flash ID: 00EC00BC0066
Flash Type:[SAMSUNG] K9F4G08/K9K4G08
FLASH LEN:0x20000000
>>The phone is setting back to Factory…

If anyone please share