Minutes felt like hours. Then, a green circle with a checkmark appeared on his monitor. Success.
Unambiguously identify if your device uses eMMC or NAND before downloading.
Because the MT8127 was used by various manufacturers (most notably Lenovo), there isn't just "one" scatter file. However, the most common and verified scatter files for this chipset are usually associated with the series.
Most official scatter files include a checksum.md5 in the firmware folder. Run:
On a rooted MT8127 device, run: