When did mobile phone Big Brother start?

The market price of a mobile phone in the 1920s and 1980s was 28,000 yuan, including a network access fee of 6,000 yuan and a pre-deposit fee of 1,000 yuan. By November 1987, Guangdong Province opened the country’s first mobile phone Communication network, the first batch of 700 users.

Their mobile phone is like a "big brother" like half a long and narrow brick, but it was only popular in the first few years when mobile phones came out. By the time most people had one in their hands, it was the latest model. , it was renamed a mobile phone.

Introduction

Mobile phone was first invented by engineers from the American Motorola Company in 1973. It is the common name for mobile phones.

But it was only popular in the years when mobile phones first came out. When most people had one in their hands and it was the latest model, it was renamed a mobile phone.

The so-called second-generation mobile phones (2G) currently used most widely around the world are mainly GSM and CDMA. They are all digital. In addition to voice communication, they can also send and receive text messages (short messages, SMS), MMS (multimedia messages, multimedia messages), Wireless Application Protocol (WAP), etc.

GSM is the most popular in mainland China and Taiwan, and CDMA and PHS mobile phones are also very popular. The entire industry is in the process of migrating to the third generation of mobile phones (3G).

The appearance of a mobile phone should generally include at least one LCD screen and a set of buttons (some mobile phones with touch screens have fewer buttons).

In addition to typical phone functions, some mobile phone keyboards also include PDA, game consoles, MP3, cameras, photography, recording, GPS and more functions, and are developing towards PDAs with mobile phone functions. trend.

Reference for the above content: Baidu Encyclopedia-Big Brother