Chm-u01 Firmware Scatter Link

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:

Alternatively, dump the GPT:

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: Chm-u01 Firmware Scatter