These tools allow you to paste a 16-byte (32-character) hex string to instantly view the internal data: MultiCID Decoder (Gough Lui)
Counterfeit eMMC chips are rampant. Clone chips often use fake labels. By reading the CID and decoding it, you can check the Manufacturer ID (MID) against the JEDEC list. If a chip claims to be 64GB Samsung but the MID decodes to an unknown Chinese vendor, you have a fake. emmc cid decoder
The CID is a unique, 16-byte read-only register embedded in every eMMC (embedded MultiMediaCard) chip. It serves as a digital "birth certificate" for the storage device. Manufacturer ID (MID): A 1-byte code assigned by the SD Association for Samsung, for Micron). OEM/Application ID (OID): These tools allow you to paste a 16-byte
A unique 32-bit number for that specific unit. If a chip claims to be 64GB Samsung
cat /sys/block/mmcblk0/device/cid