The A01 has no official unbricking tools like Qualcomm's EDL mode (often locked by carriers). A failed flash—due to wrong ROM version, power loss, or corrupted download—can result in a hard brick, turning the device into an expensive paperweight.
Unlocking the bootloader requires a factory reset, and subsequent ROM installations also wipe all user data. Without proper backups, photos, messages, and app data are permanently lost.
Because Samsung does not release full driver source code for the Snapdragon 439, custom ROM developers must reverse-engineer or adapt proprietary blobs. This can lead to non-functional hardware components—common issues on A01 custom ROMs include broken FM radio, unstable Wi-Fi direct, poor call audio quality, and malfunctioning proximity sensors.