Comprehensive technical knowledge base covering 12 GSMA eSIM specifications. 84+ articles on Remote SIM Provisioning — SGP.02, SGP.22, SGP.32, SGP.41, SGP.29, SGP.23, SGP.25, SGP.26 and more.
eUICC.tech is a technical reference for engineers, testers, and implementers working with GSMA eSIM specifications. If you need to understand how Remote SIM Provisioning (RSP) works — the eUICC architecture, profile download flows, certificate hierarchies, or conformance testing requirements — the answers are here, sourced from the primary GSMA documents.
The site covers the full eSIM ecosystem: consumer RSP (SGP.22) for phones and wearables, IoT provisioning (SGP.32) for headless devices, M2M push-model architecture (SGP.02), and manufacturing-time profile loading (SGP.41 IFPP). Supporting specs on EID numbering (SGP.29), test infrastructure (SGP.23), EUICC security evaluation (SGP.25), and test certificates (SGP.26) are also covered in depth.
Every article links to specific sections of the corresponding GSMA specification, so you can verify claims and dig deeper. No vendor marketing, no platform lock-in — just the protocols as specified.
Spec-driven. Precise. For engineers and implementers. Every GSMA eSIM specification explained in 5–12 focused articles.
Stories, analogies, and emojis. For visual learners, newcomers, or anyone who wants the intuition before the technical detail. Every article has a kid-friendly companion.
SGP.22 v2.7 : Consumer eSIM RSP: 12 articles
SGP.22 v3.x : Unified RSP (the fork) : 12 articles
SGP.32 / SGP.31 : IoT eSIM: 12 articles
SGP.02 v4.2 : M2M eSIM (legacy push model) : 12 articles
SGP.41 : In-Factory Profile Provisioning: 5 articles
SGP.29 : EID Definition & Assignment: 5 articles
SGP.23 / SGP.23-1 : RSP Conformance Testing: 10 articles
SGP.33-3 : eIM Test Specification: 5 articles
SGP.25 : eUICC Protection Profile: 5 articles
SGP.26 : RSP Test Certificates: 5 articles
New to eSIM? Start with the Guided Path : 7 articles that take you from zero to understanding the full RSP architecture.
Prefer stories? Jump to the Illustrated Edition : every concept explained through analogies, emojis, and illustrations.
Need a specific spec? Browse the full article index or search by topic.
Quick lookup? Try the Glossary for 60+ terms defined.