About SimProbe
SimProbe is a one-person, senior-only specialist boutique for the SIM, USIM, OTA and eSIM world — deliberately not implied headcount. The SIM/GSM community is small and does its due diligence, so this is a named specialist with a track record, not a fake team page.
Who's behind it
Adriaan de Haan — Senior SIM / USIM / OTA specialist, 20+ years across SIM/USIM/ISIM, OTA platforms and Java Card applet development, Brazil-based and working in English and Portuguese. The free tools and reference on this site are living proof-of-work: they encode the same expertise the consulting engagements draw on.
The thesis
Classic-SIM knowledge is a loyal, shrinking market as talent retires; eSIM/eUICC is where the market is moving. SimProbe builds the deep classic tools and plants the eSIM-era flags early — the EID parser and SGP.22 decoder alongside the ICCID, IMSI, APDU and file-system references. One foot in each, which is exactly where operators, MVNOs and IoT connectivity providers need help right now.
What we don't do
No SIM cloning, key extraction or interception tooling. The OTA work is advisory and engineering on platforms and their configuration — structure and documented algorithms, never production-key crypto in a shipped tool. Everything here is educational or engineering-grade, and every tool runs entirely in your browser.