III. The Number of Harassing Text Messages and Crank Calls Marked by Users As of December 2016, 18.38 billion harassing and cheating text messages marked by android mobile phone users were monitored by 360 Security Center and Tencent Security, including 610 million cheating text messages. Number of Harassing Text Messages Marked by Users, Monitored by Major Internet Security Enterprises 100million 70 60 51.8 50 47.7 42.2 42.1 40 30 20 10 0 Jan.–Mar. Apr.–Jun. Jul.–Sep. Oct.–Dec. Source: 360 Security Center and Tencent Security 2016.12 Figure 84 Number of Harassing Text Messages Marked by Users, Monitored by Major Internet Security Enterprises Up to December 2016, 39.12 billion crank and cheating calls marked by android mobile phone users were monitored by 360 Security Center and Tencent Security, including 4.89 billion cheating calls. The 39th Statistical Report on Internet Development in China 109109