What is the mobile phone number at the beginning of 18 1?

China Telecom 18 1 is a brand-new 3G segment starting with 18 1, which is the following 133, 153, 189 and1.

The mobile phone was first invented by Motorola.

The so-called second generation mobile phone (2G) is the most widely used in the world, mainly based on the GSM system in Europe and the CDMA system in the United States. They are all digital. Besides voice communication, they can also send and receive short messages and wireless application protocols. In Chinese mainland and Taiwan Province Province, GSM is the most popular, CDMA mobile phones are also very popular, and the whole industry is migrating to the fourth generation mobile phones (4G). In addition to typical telephone functions, some mobile phones also include PDA, game machine, MP3, camera, photography, recording, GPS, Internet access and other functions, and there is a trend to develop mobile phone functions to PDA. The microphone and earphone of the telephone and the corresponding microphone and receiver are all installed on one handle. Formerly known as mobile phones, handheld devices, mobile phones and faxes, they are portable telephone terminals that can move in a large range.

According to industry analysts, although the basic protection functions of mobile phone security products are relatively complete, there are still shortcomings in anti-harassment, privacy protection and data protection, and there is still a large market space in the future. QQ mobile phone housekeeper, security housekeeper, NetQin and other security vendors have announced their entry into the field of cloud security. 20 13 will be a crucial year for the accelerated landing of mobile cloud security, and major security vendors will continue to increase their investment in mobile cloud security solutions. At the same time, many mobile phone security vendors' products are free. While a certain user scale barrier has been formed, how to form a one-stop business model of "basic security underlying service+platform+content" will be the choice of future security vendors.