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. 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. However, there is probably some way to unlock them… All the cards I got seemed to honour that restriction. The spec includes a command (CMD26) for writing the CID, but it’s only supposed to work once in the factory when the card is first assigned an ID. There are rumours of cheap Chinese SD cards that don’t follow the official spec and allow you to change to them – I now have large pile of cheap Chinese SD cards on my desk, but unfortunately none of them did allow it. For example, if you want to change the supposedly read-only ID on various kinds of RFID tag you can simply buy a special version from China that allows it (often referred to as gold or magic cards). There is surprisingly little info out there about this, when it’s easy for other devices. I’ve spent a while trying to work out how to change the ID on some cards. 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. 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. Tool which allows you to use any sd card for your maps / Outil qui vous permet d'utiliser n'importe quelle carte SD pour vos cartes Installation Renault R-Link 1085 Europe 2022 par le Membre Takochoc Guide complet en Fr (Achetez une carte SD et modifiez vous-même votre CID)Ĭomment repérer les faux produits carte SD SID non modifiable Selling / Vente: Activation Launch x431 EasyDiag Golo + ThinkDiag viewtopic.php?f=137&t=14064 Xentry OpenShell 09.2023 HHT (+C3) WIS EPC Vediamo Monaco viewtopic.php?f=196&t=13346 Remote Install BMW ISTA-D, ISTA-P, INPA, E-Sys viewtopic.php?f=137&t=14739Ĭhanging the cid on SD card / Changer le cid sur la carte SD
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