Before downloading files, confirm your device matches these MediaTek hardware specifications to avoid hard-bricking your phone: Nokia 3.1 / Nokia 3.1 Plus
Verified scatter files are typically bundled within official stock firmware packages. Reliable sources include: : Offers a dedicated page for the nokia 31 scatter file verified
Hold the button and connect the phone to the PC via USB cable. Before downloading files, confirm your device matches these
Download the latest stable version of the Smart Phone Flash Tool. Check your Device Manager
Check your Device Manager. If you see a yellow exclamation mark next to the MTK device, reinstall the drivers, disable driver signature enforcement, and try using a different USB port (preferably a USB 2.0 port on the back of the motherboard).
Security boot (SB) mismatch. Solution: This means the verified scatter file is from an older security patch. You must find a scatter file that matches the anti-rollback index of your current bricked phone.