On 1 March 2015, HTC unveiled Vive, a virtual reality head-mounted display in collaboration with Valve. In June and October 2015, HTC reported net losses; the company has faced increased competition from other smartphone makers, including Apple, Samsung, and others, which had resulted in a decline in its smartphone sales, as well a major loss of market share. Its smartphone market share had risen back to 7.2 percent in April 2015 due to its strong sales of recent devices, but HTC's stock price had fallen by 90 percent since 2011.