HTC is working on its mobile tracking and locating service, according to Engadget. As per the website, a trademark has been filed at the Taiwan's NCC by HTC for 'portable multifunction electronic device for assistance in locating, mobile phones, smartphones, tablets, laptops and so on'.
Even if true, then HTC will not be the lone handset maker to offer such a solution. Apple has already been offering 'Find My iPhone' service since couple of years now and it helps in locating the device on web-based map interface. There are other features such as remote data swipe, push alerts and so on. Samsung has been offering similar service under similar name - Find My Mobile. LG has been offering Anti-theft Mobile Tracker service in its mobile.