Shares in the Taiwanese smartphone maker tumbled 7pc when the Taipei market opened today. It has just reported a 79% plunge in quarterly profit. The firm's slogan is 'quietly brilliant'. This year, it has mostly just been quiet. While Samsung and Apple hogged the limelight with the Galaxy S3 and iPhone 5, HTC has not had a blockbuster launch. HTC is focusing its efforts on Windows phones. Its yet to be seen whether this operating system can rival Google's Android or Apple's iOS.