Voice over LTE (VoLTE) carries voice over 4G networks. Its call quality is higher than the other VoIP variants, in addition to providing better coverage. VoLTE, as well as the other voice technologies, faces various threats from attackers. Let's begin discovering VoLTE fundamentals, in order to learn later how to attack it. Long-term Evolution (LTE) was developed by the 3rd Generation Partnership Project (3GPP) in 2014. It is an IP-based packet switch network. It uses the two modes—Time Division Duplex (TDD) and Frequency Division Duplex (FDD). LTE architecture is composed of the following three major components:
- The User Equipment (UE)
- The Evolved UMTS Terrestrial Radio Access Network (E-UTRAN).
- The Evolved Packet Core (EPC)