Dynamic Hosting Company LLC (DHC) has added 23 new defendants to its campaign, including Amazon, Apple, ASUS, BlackBerry, HTC, Huawei, LG Electronics, Microsoft, Pantech, Samsung, Sharp, Sony, T-Mobile, Verizon (Cellco), and ZTE. DHC’s complaints target defendants’ mobile phones with a visual voicemail application that connects over cellular networks. The NPE alleges that the phones infringe two patents related to fax-over-IP (FoIP) with time-based polling (5,826,026, 6,216,156).