Researchers at Michigan State University and National Chiao Tung University in Taiwan have published a paper documenting that WiFi calling services from T-Mobile, AT&T, and Verizon suffer from 4 security flaws that can be exploited to attack mobile phone users, leaking private information, harassing them, or interfering with service.
The 8 computer scientists who contributed to the paper basically claim that existing security measures fall short because of “design defects of Wi-Fi calling standards, implementation issues of Wi-Fi calling devices, and operational slips of cellular networks.”
The significance of this problem is underscored by the researchers claiming that WiFi calling volume is expected to surpass Voice over LTE and Skype calling next year.
What should you do if your users make WiFi calls? We suggest either using a VPN service on the mobile device or switching to regular cellular service.
Everyone stay safe out there!