Standard USB flashers cannot access the RPMB. You must use specialized forensic and repair hardware interfaces:
In the professional repair industry, "cleaning" the RPMB is essential for several reasons: clean rpmb emmc skhynix
Once an RPMB key is programmed, it typically cannot be changed or erased through standard software means. Why "Clean" the RPMB? Standard USB flashers cannot access the RPMB
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If the RPMB contains corrupted security data (like fingerprint or IMEI encryption keys), the device may fail to boot. Cleaning the partition allows the system to re-provision it. Essential Tools for RPMB Cleaning
RPMB is a hardware-level security feature defined by JEDEC standards. It operates using a unique authentication key shared between the CPU (Host) and the storage chip.
An eMMC chip from a salvaged Samsung phone, for example, will have a programmed RPMB key. To use that chip in another model, the RPMB must be cleared so a new key can be written.