The benefit of using virtual sim card technology lies in its ability to provide flexibility and convenience for mobile users. Unlike traditional SIM cards, virtual SIMs can be activated without needing physical cards, allowing users to connect to cellular networks seamlessly across different devices. This technology enhances roaming capabilities, allowing users to switch networks without changing SIM cards and simplifying management of multiple numbers. Additionally, virtual SIM cards can reduce costs associated with international calls and provide better security by minimizing the risk of SIM fraud. Overall, it leads to an improved user experience in mobile communications.