Researchers have disclosed security vulnerabilities in handover, a fundamental mechanism that undergirds modern cellular networks, which could be exploited by adversaries to launch denial-of-service (DoS) and man-in-the-middle (MitM) attacks using low-cost equipment. The New York University Abu Dhabi researchers say the problem affects all generations since 2G (GSM) Handover is a process in telecommunications in which a phone call or a data session is transferred from one cell site to another cell tower without losing connectivity during the transmission.”]
Source: https://thehackernews.com/2021/12/new-mobile-network-vulnerabilities.html