Hello Jacob, Am 17.02.24 um 12:04 schrieb Jakob Bohm via Gnupg-users: [...]
I don't know exactly how the situation about this is in Germany. But here in Austria many mobile phone shops have a SIM card punch with which you can punch out a micro-SIM or nano-SIM from a standard-SIM.In some other countries, the mobile providers issues SIMs that are pre-punched to pop out either of the 3 small sim sizes from a full credit-card sized card where key information like the PUK code and serial number are printed. More generally, there is no guarantee that hardware cards not sold through mobile phone carriers keep the actual chip/electronics within the nano-sim area near the middle of the contacts, most notably, NFC compatible cards will often have the NFC antenna outside that area, and it's a matter of luck if the contact card functionality works after cutting on any given hardware model.
We are not talking about 'normal SIM cards' for use by mobile telephony but rather about the OpenPGP Smart Card V3.4 in SIM format [1]. This also doesn't have NFC functionality, so it can be punched fairly safely. You just have to do it right
best regards Juergen[1] https://www.floss-shop.de/de/security-privacy/smartcards/13/openpgp-smart-card-v3.4
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