eSIM demystified: it's just a programmable SIM soldered onto a chip
zetalyrae · x · 2026-10-08
The author learns that eSIM is literally just a programmable SIM card soldered onto a chip—the e stands for embedded. The quoted tweet floats a 'slightly more illegal' weekend project: desoldering an MFF2 eSIM (a WSON-8-like package) onto a nano SIM adapter board to reuse it for mobile data, with solder-free adapters also available.
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