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Technology Publication · Europe Edition

eSIM Technology
Decoded.

Independent technical analysis and editorial coverage of embedded SIM technology, network standards, and mobile connectivity across Europe. Built for engineers, researchers, and informed travelers.

Technical Guide Device Database
GSMA
RSP Standard
eUICC
Chip Architecture
SM-DP+
Provisioning
Technology circuit
eSIM · eUICC · RSP · GSMA SGP.22
SGP.22
GSMA Consumer Spec
SGP.02
M2M Specification
5G NR
Network Standard
30+
EU Countries Covered

Latest Analysis

Editorial
Network technology
Standards

GSMA SGP.22 v3.0: What the Latest eSIM Standard Means for Travelers

An analysis of the updated Remote SIM Provisioning specification and its practical implications for consumer eSIM devices in 2025.

Read analysis →
Data network
Networks

5G eSIM Performance Across European Capital Cities: A Technical Overview

Examining 5G NR deployment progress and eSIM compatibility across Berlin, Paris, Amsterdam, Madrid, and Warsaw.

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Mobile security
Security

eSIM Security Architecture: How the eUICC Protects Your Identity

A technical examination of the cryptographic mechanisms that make eSIM more resistant to SIM-swapping attacks than physical SIM cards.

Read analysis →
Technical Overview

The Architecture of eSIM

The eSIM ecosystem is built on a layered architecture defined by the GSMA's RSP (Remote SIM Provisioning) specifications. Understanding this architecture is essential for anyone working with eSIM technology professionally or making informed decisions as a consumer.

At the hardware level, the eUICC (embedded Universal Integrated Circuit Card) is a tamper-resistant secure element containing a Java Card operating system. This chip stores operator profiles — each containing the authentication keys, network credentials, and service parameters needed to connect to a specific carrier's network.

The provisioning infrastructure consists of two main server types: the SM-DP+ (Subscription Manager Data Preparation Plus), which prepares and stores operator profiles, and the SM-DS (Subscription Manager Discovery Service), which helps devices discover available profiles. When you scan a QR code to activate an eSIM, your device contacts the SM-DP+ server encoded in that QR code.

Read Full Technical Guide
01

eUICC Hardware Layer

Tamper-resistant secure element with Java Card OS. Stores up to 8+ operator profiles. Cryptographically isolated from main processor.

02

LPA (Local Profile Assistant)

Software layer on the device that manages profile downloads, activation, and deletion. Provides the user interface for eSIM management in device settings.

03

SM-DP+ Server

Operator-side infrastructure for profile preparation and secure delivery. Authenticates device eUICC before profile download using PKI certificates.

04

CI (Certificate Issuer)

Root of trust for the entire eSIM ecosystem. Issues certificates to device manufacturers and operators. GSMA acts as the primary CI for consumer eSIM.

Device Compatibility Matrix

Full database →
Manufacturer Series eSIM Support Dual SIM 5G
AppleiPhone 14–16FullDual eSIMYes
SamsungGalaxy S20–S24FullPhysical + eSIMYes
GooglePixel 3–9FullPhysical + eSIMPixel 5+
XiaomiMi 11 Ultra, 12–13PartialRegion-dependentSelect
MotorolaRazr 40, Edge 40+PartialPhysical + eSIMSelect

European Network Coverage

🇩🇪
Germany
4G/5G
🇫🇷
France
4G/5G
🇳🇱
Netherlands
4G/5G
🇪🇸
Spain
4G/5G
🇮🇹
Italy
4G/5G
View all 10 countries →

Technical FAQ

What is the GSMA SGP.22 specification?

SGP.22 is the GSMA's technical specification for consumer eSIM (Remote SIM Provisioning for Consumer Devices). It defines the protocols for profile download, management, and the interfaces between devices, operators, and infrastructure servers.

How does eSIM prevent SIM-swapping attacks?

eSIM profiles are cryptographically bound to specific eUICC chips using PKI certificates. Unlike physical SIMs, an eSIM profile cannot simply be moved to another device — any transfer requires authentication through the provider's infrastructure.

What is an SM-DP+ server?

SM-DP+ (Subscription Manager Data Preparation Plus) is the server infrastructure operated by eSIM providers to prepare, store, and securely deliver operator profiles to consumer devices. It's the backend system your device contacts when you scan an eSIM QR code.

Can eSIM support 5G SA (Standalone) networks?

Yes. eSIM is network-generation agnostic — the same eSIM hardware and provisioning protocols work with 2G, 3G, 4G, and 5G networks, including both NSA (Non-Standalone) and SA (Standalone) 5G architectures.

View all technical questions →