A slew of newly discovered vulnerabilities can wreak havoc on 4G LTE network users by eavesdropping on phone calls and text messages, knocking devices offline, and even spoofing emergency alerts.
Ten attacks detailed in a new paper by researchers at Purdue University and the University of Iowa expose weaknesses in three critical protocol operations of the cellular network, such as securely attaching a device to the network and maintaining a connection to receive calls and messages.
I’m not fully informed on the cellular protocols, but it seems to me this study is basically announcing the discovery of the stingray cell site simulator. https://en.wikipedia.org/wiki/Stingray_phone_tracker