Knowledge Hub

Read our latest articles about digitalization, IoT, Cloud and Cybersecurity.

The integrated SIM iSIM explained A1 Digital

The integrated SIM (iSIM) explained

Explore iSIM technology and how it’s revolutionizing the way devices connect to mobile networks. This article delves into the advantages of iSIM, including its space-saving design, enhanced flexibility, and how it’s shaping the future of IoT applications.

30.09.2026

IMSI: The central subscriber identification explained

IMSI: The central subscriber identification explained

The IMSI number uniquely identifies mobile subscribers within a network and is essential for secure communication in mobile services and IoT applications. This article covers its function and key security aspects.

30.09.2026

Efficient Site Connectivity: The Right Underlay Can Make All the Difference

Learn how the right underlay optimizes site connectivity, increases reliability, and reduces network complexity and costs.

30.09.2026

46 A1 Digital 2g shutdown europe header

2G shutdown in Europe: Timelines, technologies, and what businesses should do now

2G shutdown in Europe: Learn what the 2G network switch-off means for businesses, connected devices and IoT, and how to prepare for the transition.

23.09.2026

34 A1 Digital SIM card sizes Header v4

SIM card sizes explained: Mini, Micro, Nano & eSIM

Explore the evolution of SIM cards—from full-size and Mini SIMs to the modern Nano SIM and eSIM—understand their differences in format, dimensions, and functionality for today’s devices.

21.09.2026

Further Articles

What is TCP/IP?

What is TCP/IP?

Dive into the world of TCP/IP, the fundamental protocol that powers internet communication. This article explains how TCP/IP works, its key components, and why it remains essential for modern networking and digital communication.

21.09.2026

NIS2

NIS2: What companies need to know and implement now

The EU’s NIS2 Directive raises the bar for cybersecurity across critical sectors and their supply chains. Discover what the new rules mean for your organization and how to start preparing now.

02.09.2026

What is Information Security Management (ISM)?

What is Information Security Management (ISM)?

Learn what Information Security Management (ISM) is, why it is essential for protecting business-critical information, and how organizations can establish effective security processes. Discover the role of ISMS, ISO 27001, risk management, and clearly defined responsibilities in building a resilient security framework.

02.09.2026

APN (Access Point Name) and its importance for mobile device data connections

APN (Access Point Name) and its importance for mobile device data connections

Discover how Access Point Names (APNs) serve as crucial gateways between mobile devices and the internet, ensuring seamless data connectivity. This article delves into the structure and significance of APNs, highlighting their role in reliable mobile network communication.

13.08.2026

IoT Protocols A1 Digital

IoT Protocols: A comprehensive guide for enterprises

In this comprehensive guide, we explore the key IoT protocols that enable seamless communication between devices. Learn about the various protocols, their functions, and how they play a crucial role in ensuring efficient and secure IoT networks.

13.08.2026