Vulnerability Details: CVE-2024-53026. It is a vulnerability affecting O2 UK’s VoLTE/IMS service, disclosed in mid-May 2025. Rated Low, with a CVSS v3 score of 3.5. It has a limited impact on confidentiality […]
O2 UK Fixed VoLTE Flaw that Exposed User Mobile Location Data UPDATE
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. […]
VoWiFi vs Cellular: Which is better?
Voice calls remain one of the most vital means of communication in both personal and professional spheres. They provide instant and direct interaction, allowing for clear and immediate conversations. Unlike […]
What is VoLTE Roaming? Architecture Options and Challenges
The 3rd Generation Partnership Project (3GPP) architecture has introduced a subsystem known as the IP Multimedia Subsystem (IMS) as an addition to the Packet-Switched (PS) domain. IMS supports new, IP-based […]
Call Session Control Function (CSCF) in IMS
The Call Session Control function (CSCF) is the heart of the IMS architecture and is used to process SIP (Session Initiation Protocol) signaling. The main function of the CSCF is […]
IMS Is The Core of VoLTE Network
Voice over LTE, or VoLTE is a GSMA profile of the standards defined for the delivery of services currently provided via Circuit Switch networks – mainly voice and SMS – […]
What is the Value of VoLTE?
VoLTE is the all-IP method that tightly links the voice application to the LTE network to assure the best subscriber experience in terms of performance, reliability, interoperability and global roaming. […]
VoLTE Call Flow
VoLTE Call Flow: Turing on the VoLTE-enabled devices (e.g., smartphones) connects it to the LTE network infrastructure. Then, two default EPS bearers are assigned – one for SIP signaling with […]