Net profits in the third quarter came in at Tw$3.9 billion ($133.1 million), down sharply from Tw$18.64 billion a year ago, the company said, without providing details.
Revenues totalled Tw$70.2 billion, meeting the lower side of the Tw$70 billion-Tw$80 billion range it had previously forecast. The revenues marked a sharp decline of 48 percent from a year ago when they were Tw$135.82 billion.
HTC sells its own smartphones and also makes handsets for a number of leading US companies, including Google's Nexus One.
The company has recently unveiled a new series of smartphones to compete with US technology giant Apple and South Korea's Samsung, which separately launched the iPhone 5 last month and the Galaxy Note II in late September.
For the latest tech news and reviews, follow Gadgets 360 on X, Facebook, WhatsApp, Threads and Google News. For the latest videos on gadgets and tech, subscribe to our YouTube channel. If you want to know everything about top influencers, follow our in-house Who'sThat360 on Instagram and YouTube.