Smartphones and tablets maker HTC this morning said it foresees a huge drop in revenue (PDF) in the first quarter, citing “short-term difficulties” as it gears up to - reportedly - launch four new phone models at the Mobile World Congress later this month.The Taiwanese company sees revenue dropping as much as 36 percent in Q1, to between NT$65 billion and NT$70 billion (roughly $2.2 and $2.4 billion) due to this “product transition”.