On 2024-02-17 12:37, Juergen BRUCKNER via Gnupg-users wrote:
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
Exactly, and there is no easy way of knowing if the cards used by
floss-shop havechip parts outside the nano-sim boundary, which is
smaller than the contact area on ID000 cards (seriously possible),
nor if those cards are internally multi-chip constructs (rare but
possible).
Enjoy
Jakob
--
Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark. Direct +45 31 13 16 10
This public discussion message is non-binding and may contain errors.
WiseMo - Remote Service Management for PCs, Phones and Embedded
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