HTC Smart runs Brew os --
The Smart runs the Brew operating system designed by Qualcomm and has the Sense UI as an overlay to that operating system.
HTC has launched 6 devices this quarter, only one of which, the HTC HD Mini, is Windows Mobile, but HTC's director of investor relations Joey Cheng Cheng said that despite the early adoption of Google Inc's Android by US consumers, Europeans and Asians continued to be more familiar with smartphones running on the Windows platform.