and files and some cell phones are handled with gps technology

HistoryIn 1987, wireless telephone communication in the modern sense started by the Ministry of Posts and Telecommunications of China, using GSM technology. A nationwide network was completed in the following year.[1]In 2000, the fixed telephone company (China Telecom) and two mobile phone telephone companies (China Mobile and China Unicom) were spun off from the Ministry of Posts and Telecommunications.In 2002, the fixed telephone company was split into two: China Netcom for North China and China Telecom for South ChinaUntil 2008, China's mobile phone service was provided by the three companies:GSM service from China MobileGSM and CDMA service (begun in 2002) from China Unicom.PHS service from the two fixed phone companies: China Netcom and China TelecomIn 2008, another reorganization of the telecommunications industry was made a year before the 3G service was granted.In 2015, China recorded 1.3 billion mobile subscribers in its domestic market. [2] Nearly everyone in the country has a mobile phone.[2] Nearly 29.6 percent of mobile consumers or 386 million users are on the LTE 4G network.

Old rotary telephone and modern cell phone concept illustration.