Longhorn HD LLC has launched a third litigation campaign, suing Samsung (2:20-cv-00350) in the Eastern District of Texas over a single patent, acquired from Intellectual Ventures LLC (IV) and generally related to an “information backup system”. The NPE targets Samsung over the provision of smartphones that support Smart Switch, a technology for “seamlessly” upgrading from one model to another. Concurrently, Longhorn HD has added three new defendants to its existing network security campaign, hitting Mitel Networks (Mitel Software Technologies) (2:20-cv-00350), NetScout Systems (2:20-cv-00349), and Trend Micro (2:20-cv-00348), also in East Texas, over a variety of networking hardware and software products.