I suggest you make a note of the old CID first, in case you want to set it back later. If you only need to change the card serial number (part of the CID) you can supply the old CID and the new serial number and the new CID will be calculated for you. Supply the new CID you want to set on the command line. List the /dev/block folder and make sure the device you going to use appears and disappears as you insert and remove the SD card to be sure. dev/block/mmcblk1 (you almost certainly do not want to use mmcblk0, that is likely to be the built-in storage on your device). Run the tool and point it to the SD card device e.g. Copy the evoplus_cid binary to the device and put it somewhere with a proper Linux file system (not FAT), then apply execute permission to it. To use you simply need a rooted Android device with an SD card slot. I have taken the SamDunk code and reworked it a little to make it easier to use for SD cards, but all the credit really needs to go to the original author. I now also have a stack of Samsung SD cards on my desk, but with the last different one I found I struck gold! (Collecting Samsung cards is more expensive than cheap Chinese ones and it takes some effort to avoid getting fakes.) The Samsung EVO Plus 32GB MicroSDHC card took the commands from SamDunk and let me change the CID. So I started buying Samsung SD cards, hoping for one with the same moviNAND core as the eMMC in their phones. Where Sean Beaupre had managed to unlock a Samsung phone (to developer mode) by reverse engineering some of the eMMC firmware on his device and finding commands that allowed the CID to be unlocked and rewritten. Vous devez être inscrit et connecté sur ce forum pour voir le contenu caché. Reading around they seem work in the same way and appear the same within Linux. I’m not well enough versed on the technology to know quite what the difference between eMMC and SD cards are, aside from the way SD cards are packaged of course – although that might be all there is to it. In that presentation was mention of vendor commands for a Samsung eMMC used as the built-in storage on an Android phone. If you’ve found this page by looking for help on this topic you’ve probably already seen Bunnie Huang’s SD card hacking presentation, unfortunately I wasn’t able to track down any APPO AX211 based cards, which I thought would be my best bet. This can result in you being stuck with a smaller card than you’d like in a device or not being able to use a backup in case of damage.Ĭhange cid sd card,sd card cid changer software,change cid sd, change cid sd card,sd card cid changer software,change cid sd, The CID register on SD cards is supposed to be read-only, which means it can be used to lock devices to specific SD cards, preventing the user swapping them out, which is very annoying. This is the checksum of the CID contents computed as described in SD Specification.Change cid sd card,sd card cid changer software,change cid sd, The manufacturing date is composed of two hexadecimal digits one is 8 bits representing the years(y) and the other is 4bits representing the month (m).ĬRC7 checksum (7 bits). The Serial Number is 32bits of binary number. The “n” is the most significant nibble and “m” is the least significant nibble As an example, the PRV binary value field for product revision “6.2” will be: 0110 0010b The product revision is composed of two Binary Coded Decimal (BCD) digits, four bits each, representing an The product name is a string, 5-character ASCII string. Ltd., SanDisk Corporation and Toshiba Corporation. Note: SD-3C, LLC licenses companies that wish to manufacture and/or sell SD Memory Cards, including but not limited to flash memory, ROM, OTP, RAM, and SDIO Combo Cards SD-3C, LLC is a limited liability company established by Matsushita Electric Industrial Co. This procedure is established to ensure uniqueness of the CID register. The OID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC. This procedure is established to ensure uniqueness of the CID register.Ī 2-character ASCII string that identifies the card OEM and/or the card contents (when used as a distribution media either on ROM or FLASH cards). The MID number is controlled, defined, and allocated to a SD Memory Card manufacturer by the SD-3C, LLC. The structure of the CID register is defined in the following paragraphs:īinary number of 8-bit that identifies the manufacturer of the card. Every individual Read/Write (RW) card shall have a unique identification number. It contains the card identification information used during the card identification phase. The Card Identification (CID) register is 128 bits wide.
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