Part I Get Started -- 1 Background and Overview -- Part II Bandwidth Is The First Concern -- 2 Fast and Light Bandwidth Testing for Mobile Internet -- 3 Offline Downloading via Cloud and/or Smart APs -- Part III Never Waste on Traffic Usage -- 4 Cross-App Cellular Traffic Optimization -- 5 Boosting Mobile Virtual Network Operator -- Part IV Stay Connected At All Times -- 6 Enhancing Nationwide Cellular Reliability -- 7 Heading Off Fake Base Stations at Scale -- Part V Do Not Relax Our Vigilance -- 8 Combating Nationwide WiFi Security Threats -- 9 Understanding IoT Security with HoneyCloud -- Part VI Last Thoughts -- 10 Concluding Remarks.