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I would like to reduce the footprint of my PCB (a simple IOT GSM impl.). Given a common GSM such as SIM800/868/900l etc. Would it be possible to completely replace the footprint of a SIM card holder (which is larger than the GSM/IC) by copying the data held on the SIM card initially to a global flash chip or suitable substitution thereof for later use (without the SIM card). Nothing seems obviously wrong with this approach though I thought I would double check:

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where the sim1 and sim2 respectively represent the DATA (SIMDATA) pads of the sim 1 and 2 and the ic and gsm communicate via UART/GPIO.

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Would there be anything initially wrong with following this trajectory or any conceivable misnomer therein?

Thanks

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    \$\begingroup\$ You mean, something like an eSIM ? \$\endgroup\$
    – Finbarr
    Commented Aug 31, 2021 at 21:23
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    \$\begingroup\$ The Sim has crypto to protect the service providers data. As Finbarr suggests, an eSim might be appropriate, but not all providers support it. Its a bit bleeding edge at the moment. \$\endgroup\$
    – Kartman
    Commented Sep 1, 2021 at 1:37

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