Smartphone maker HTC is facing stiff competition and sees around a 14.5 percent fall in revenue in the fourth quarter from the previous three months, while its margins will also decline.

The company expects its fourth-quarter revenue to be about T$60 billion ($2.05 billion), down from T$70.2 billion in the third quarter.

HTC also said it expects a gross margin and an operating margin of around 23 percent and 1 percent, respectively, falling from 25 percent and 7 percent in the previous quarter.

HTC has rolled out new models to regain market share, including the 5-inch full-HD "HTC J" targeted at the Japanese market and the "HTC One X+", an upgraded version of its high-end flagship model last Tuesday, both running Google's operating system.

Last month, the company also introduced two models running Microsoft's Windows Phone 8 software, the Windows Phone 8X and the Windows Phone 8S.