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

LPWAN for IoT: A guide to what companies should know_A1 Digital

LPWAN: Connectivity made easy for companies

In this guide, we explore LPWAN (Low Power Wide Area Network) technology and its significance for IoT. Learn how LPWAN enables cost-effective, long-range connectivity for IoT applications, and why it’s an essential solution for businesses looking to optimize their IoT deployments.

05.08.2026

Why Data Loss Prevention (DLP) is essential for data security

Why Data Loss Prevention (DLP) is essential for data security

Data Loss Prevention (DLP) is essential for safeguarding sensitive company information from unauthorized access or leaks. Learn how DLP works to protect your business from potential data breaches and compliance risks.Data Loss Prevention (DLP) protects sensitive data from loss and unwanted outflow.

30.06.2026

What is Network as a Service NaaS explained_A1 Digital

What is Network-as-a-Service? NaaS explained

Looking for a flexible and cost-effective networking solution? Discover how Network-as-a-Service (NaaS) is transforming the way businesses manage their networks. Learn how NaaS can simplify operations, reduce costs, and scale your business efficiently in our latest blog post.

30.06.2026

Secure Web Gateway: Why an SWG is essential for safe browsing in the workplace

Secure Web Gateway: Why an SWG is essential for safe browsing in the workplace

Learn how a Secure Web Gateway (SWG) helps protect your business by blocking harmful websites, preventing malware, and ensuring secure web traffic—essential for today’s remote and cloud-driven work environments.

29.06.2026

What is Firewall as a Service (FWaaS)? A complete overview for companies

What is Firewall as a Service (FWaaS)? A complete overview for companies

Learn how Firewall as a Service (FWaaS) offers scalable, cloud-based security with real-time protection and zero-maintenance updates.

03.06.2026