HTC on Monday reported earnings for the fourth quarter last year along with guidance for the first quarter that missed analysts’ estimates. Further highlighting the slump that began in October with the launch of Apple’s iPhone 4S, the Taiwan-based vendor posted fourth-quarter revenue of NT$101.42 billion, or approximately $3.5 billion USD, down 2.5% compared to the same quarter in 2010. Gross profit slid nearly 12% in the fourth quarter to NT$27.5 billion, and HTC’s total assets on hand at the end of the year slid more than 33% to NT$254.59 billion. In the first quarter of 2012, the vendor expects the rough patch to continue ahead of new product launches due later in the first half. HTC said first-quarter sales will likely fall between NT$65 billion and NT$70 billion while Wall Street expected guidance of approximately NT$85 billion.