HTC reported a record quarter Friday as its 2010 smartphone shipments were more than double the previous year. HTC saw record revenue in Q4, topping $3.3 billion on shipments of 9.9 million units. The company reports that it shipped almost 25 million total units in its fiscal 2010. HTC, which went public just three years ago, has quickly built a smartphone empire on the back of Google’s Android operating system. HTC is now expanding to also build smartphones powered by Microsoft’s new mobile OS, Windows Phone 7, but it will continue to use Android as its main operating system. “We believe the overall pie is still big enough to have at least three to four tier-1 players enjoy the growth momentum,” the company said in a statement. Clearly, HTC has no plans to relinquish its place among those tier-1 players.