For the CHM-U01, the scatter file typically contains 20–30 regions, from the Anti-Rollback (ARB) partition to the userdata area. A typical line from the CHM-U01 scatter looks like this:
Let’s dissect the CHM-U01’s scatter file not as a simple partition table, but as a low-level hardware blueprint. In the world of MediaTek (MTK) chipsets—which power the CHM-U01 (MT6735P)—a scatter file describes how the eMMC (embedded MultiMediaCard) flash memory is partitioned in physical address space . Unlike high-level block devices ( /dev/block/mmcblk0pX ), the scatter file works at the pre-bootloader level. SP Flash Tool, the standard flashing utility for MTK devices, uses this file to write raw data to exact physical offsets. Chm-u01 Firmware Scatter
Alternatively, dump the GPT:
On the CHM-U01, the proinfo partition (containing factory SN) sits between seccfg and nvram . If you shift offsets even by 1 byte, the eMMC’s GPT and the scatter will mismatch, leading to S_FTHND_FILE_IS_NOT_LOADED_YET or STATUS_EXT_RAM_EXCEPTION errors. You don’t always need the original firmware package. On a rooted CHM-U01: For the CHM-U01, the scatter file typically contains