Chm-u01 Firmware Scatter Apr 2026

If you’ve ever downloaded a stock firmware package for a Huawei CHM-U01 (better known as the Huawei Y6 Pro or Honor 5A in some markets), you’ve likely encountered a small but critical file with the .xml extension: the scatter file . To the uninitiated, it looks like a messy list of hexadecimal addresses. But to those who reverse-engineer, repair, or unbrick Android devices, the scatter file is the Rosetta Stone of the device’s storage architecture.

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

Alternatively, dump the GPT:

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. If you’ve ever downloaded a stock firmware package

adb shell su cat /proc/dumchar_info This MTK-specific proc node outputs the exact scatter layout used by the kernel. Compare it to your XML — if mismatched, the device has been repartitioned. For the CHM-U01, the scatter file typically contains

For the curious repair technician: the scatter file is where software meets silicon. Treat it with respect. Need a specific CHM-U01 scatter XML example or help recovering from a bad flash? Leave a comment.

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: