Technical research and independent analysis of eSIM infrastructure, MVNO market dynamics, and mobile connectivity solutions for travelers navigating European telecommunications networks.
A technical examination of the Remote SIM Provisioning specification that underpins every eSIM transaction, from profile download to carrier switching.
Mapping the wholesale network relationships behind consumer-facing travel eSIM brands reveals surprising concentration at the infrastructure layer.
Separating marketing claims from network reality: an analysis of 5G deployment density across European capitals and secondary cities.
The eSIM ecosystem is built on a layered technical architecture defined by the GSMA's Remote SIM Provisioning (RSP) specifications. Understanding this architecture helps travelers make sense of why different providers behave differently and why certain compatibility issues arise.
At the hardware level, the eUICC (Embedded Universal Integrated Circuit Card) is the physical chip that stores and manages SIM profiles. The GSMA's SGP.22 specification (Consumer RSP) defines how profiles are downloaded, activated, and deleted on consumer devices.
Above the hardware layer, a Subscription Manager Data Preparation (SM-DP+) server handles profile encryption and delivery. This server is operated by the eSIM provider and communicates with your device through an encrypted channel when you scan a QR code or use an app to install a profile.
The network layer sits above this: the actual mobile network infrastructure that carries your data. For travel eSIM providers, this typically involves roaming agreements or wholesale capacity purchases from local carriers in each country.
Monthly technical briefings on eSIM infrastructure developments, regulatory changes, and connectivity research. No marketing. No sponsored content.
