What does GSM CDMA WCDMA stand for?

At present, the mobile phone network is divided into 2 G, 3 G and 4 G, and 1G can only make calls, which is the kind of mobile phone that doesn't say much;

GSM is the name of 2G network, which can make phone calls and send short messages online. The full name of GSM is global? System? For what? Cell phone? Communications, a global mobile communication system in Chinese, commonly known as "GSM", is a technical standard of mobile communication originated in Europe and is the second generation of mobile communication technology. Its development purpose is to enable all parts of the world to use the same mobile phone network standard, so that users all over the world can use a mobile phone.

WCDMA is a 3G network widely used in the world, which is used by China Unicom. The full name of WCDMA is WidebandCDMA, which is translated as "Broadband code division multiplexing Access" in Chinese. It can support data transmission rates from 384Kbps to 2Mbps. It can provide a transmission rate of 384Kbps in high-speed mobile state, and the highest transmission rate can reach 2Mbps in low-speed or indoor environment.

CDMA is 3G used by China Telecom. CDMA is Code division multiple access (code? Organization? How much? Access), which is a new and mature wireless communication technology developed on the branch of digital technology: spread spectrum communication technology. It can meet the market's high demand for mobile communication capacity and quality, and has the characteristics of high spectrum utilization, good voice quality, strong confidentiality, low dropped call rate, small electromagnetic radiation, large capacity, wide coverage and so on, which can greatly reduce investment and operating costs.

A mobile phone refers to a mobile phone, or a wireless phone, usually called a mobile phone. It was originally just a communication tool, commonly known as mobile phone in the early days. This is a portable telephone terminal that can be widely used. It was originally developed from the battlefield mobile phone manufactured by Bell Laboratories in 1940.