Inventor-controlled Traxcell Technologies, LLC has filed a second round in the litigation campaign that it began this past January. The new suits assert all members of a four-patent family, generally related to a system for maintaining the expected performance of a wireless network based on the location of mobile devices, against carriers AT&T (2:17-cv-00718), Deutsche Telekom (T-Mobile) (2:17-cv-00720), SoftBank Group (Sprint) (2:17-cv-00719), and Verizon (2:17-cv-00721). These new cases have been filed as the remaining active defendants in the first round of Traxcell’s campaign—China Huaxin Post & Telecommunication Economy Development Center (Alcatel-Lucent Enterprise), Huawei, Nokia, and Samsung—attack the sufficiency of the NPE’s infringement contentions in those cases. The infringement allegations in Traxcell’s new complaints focus on the defendants’ use of various products and services related to cellular service, including network management.