HTC will step into the large-size smartphone segment by launching a flagship model with a 5-inch display featuring a resolution of 1794 by 1080 pixels in September-October, according to industry sources. Samsung Electronics, which pioneered the development of the 5-inch segment, also plans to release a 5.5-inch model, the Galaxy Note II, at the end of August, the sources noted. The brisk sales of Samsung's 5.3-inch Galaxy Note have attracted a number of vendors in Korea and China to venture into the large-size segment, noted the sources. LG Electronics stepped into the segment by launching its 5-inch Optimus Vu in May 2012, and fellow company Pantech rolled out its second 5-inch model, the Vega S5, in July. In China, Coolpad has launched two 5-inch models, the dual-SIM 9930 and 9900, while K-Touch has released the W710, which supports Alibaba cloud computing services.