The 5G Non-Terrestrial Network (NTN) integrates satellite and airborne platforms with terrestrial 5G networks to provide ubiquitous coverage. The Next-Generation Radio Access Network (NG-RAN) architecture in 5G NTN can be designed to […]
Transparent 5G NTN NG-RAN Architecture
Interworking Security Between 5G and EPC
Interworking security between 5G and EPC involves managing security contexts during mobility between the two systems. This ensures that the UE can maintain secure connections regardless of the access […]
VoLTE Roaming Global Coverage (2025)
As of April 2025, the global landscape of Voice over LTE (VoLTE) roaming agreements has expanded significantly, reflecting the industry’s shift towards all-IP voice services and decommissioning legacy 2G/3G networks. […]
Widespread Power Outage hits Spain and Portugal
The blackout, which began around midday, disrupted essential infrastructure, including mobile networks, internet services, and emergency communication systems. In both Spain and Portugal, users experienced difficulties with voice calls, and […]
Global Title Lease is BANNED in UK
I wrote an article before about ” What is GT (Global Title)? Why Do We Need It?” What is Global Title Leasing? GT leasing is the practice of a mobile […]
What is Calling Line Identification (CLI) Spoofing?
Last weekend, by coincidence, I found a fraud story related to the Telecom domain called “Spoofing CLI” or “Calling Line Identification (CLI) spoofing.” which is a technique used in mobile […]
Common SS7 Attacks through Data Leakage
The SS7 network was once considered an environment that controls users’ access to network-based content and services, allowing licensed mobile operators to access customer data. However, many unlicensed entities currently […]
The Importance of Firewall in 5G Network
Many types of firewalls are often categorized by system protection, form factor, network placement, and data filtering method. Regarding 5G, Firewalls protect different network layers — especially in the Service-Based […]
2G and 3G Sunset is Not An Easy step for MNO
Sunsetting 2G and 3G networks is not an easy step for mobile network operators (MNOs) due to several technical, financial, and social factors. The decision isn’t just about technology—it’s about […]
Common SS7 Attacks through Data Leakage
? The SS7 network was once considered an environment that controls users’ access to network-based content and services, allowing licensed mobile operators to access customer data. However, many unlicensed entities […]
Evolution of Network Core Signaling protocols
?Previous generations relied on the SS7 and Diameter protocols. The 5G network core is built on well-known Internet protocols such as HTTP and TLS. ? Security threats associated with 3G […]