Another affiliate of Golden Wave Partners Co., Ltd. has kicked off a US litigation campaign. On April 26, Kaifi, LLC, a Texas entity formed in mid-March, accused AT&T (2:19-cv-00138) of infringing a single patent that the plaintiff contends is “directed to an Internet network connecting and roaming system and method”. The plaintiff identifies AT&T’s accused instrumentalities as “systems, networks, and components and services thereto for implementing seamless network transition, including offloading to a Wi-Fi network, such as their Wi-Fi Calling system and service”.