This build is critical because using a dump file from a different version (e.g., A156EXXU1AXB3) may cause touchscreen failures, sensor dead zones, or modem crashes.
Users of flagship devices often have easy access to authorized service centers and warranty support. Users of budget devices, however, often rely on local, unauthorized repair shops that utilize these dump files and NV tools to keep devices running. When Samsung releases a firmware update that alters the partition structure (a common anti-rollback measure), the availability of a specific dump file like "A156EDXS1AXA4" becomes a lifeline for independent technicians. The suppression of these files by manufacturers is often framed as a security measure—protecting the integrity of the device—but it also functions as a form of planned obsolescence and control over the repair ecosystem. samsung a15 5g a156edxs1axa4 dump file nv file link