Where do you live? purchase brand amoxil Xiaomiâs business model is part hardware, part software and part social networking. Xiaomiâs Android-based operating system is updated every week, making it a hit with tech nerds. Service and clubbiness are its other strengths. Users can ask for help via microblog Weibo and get a reply in minutes. A dose of scarcity marketing adds secret sauce: the low-cost Hongmi model sold out within 90 seconds of its recent launch.