Backup all data and nvram.
Warning: New black coolpad note 3 users be careful.It is must to take full rom backup through twrp before you proceed (on external sd card).Many reported that this is not working on black and many reported working,so take precautions.
Disclaimer: Please do it at your own risk, I am no way responsible if anything goes wrong or you ruin /brick your phone..
1.Install both the drivers(windows 7 preferable)(It should be successfully installed all drivers)
3.Open SP flashtool
4.Click Scatter Loading then select scatter file from downloaded stock ROM
5.Click on download -> switch off your phone and connect to PC
6.Wait till below green popup appears
7.Now disconnect your phone & reboot.It will stuck on Fastmmi mode written "up down" on screen.
8.Download minimal ADBtool and extract on your desktop.Install that.
9.Connect your device to the computer.
10.Open the adb tool just installed and check device is listed or not by " adb devices " command.
11.Give this command “adb shell fctest system reboot”
12.Now phone is switched on,do the onscreen settings.