# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

2G

2G is short for second-generation wireless mobile telecommunications technology. Second-generation 2G cellular telecom networks were commercially launched on the GSM standard in 1991. Three primary benefits of 2G networks over their predecessors were that phone conversations were digitally encrypted; 2G systems were significantly more efficient on the spectrum allowing for far greater mobile phone penetration levels; and 2G introduced data services for mobile, starting with SMS text messages. 2G technologies enabled the various mobile phone networks to provide the services such as text messages, picture messages, and MMS (multimedia messages). All text messages sent over 2G are digitally encrypted, allowing for the transfer of data in such a way that only the intended receiver can receive and read it.

2G是第二代无线移动通信技术的缩写。第二代2G蜂窝电信网络于1991年在GSM标准上商用。2G网络相对于其前身的三个主要优点是电话交谈进行了数字加密; 2G系统在频谱上的效率显着提高，从而使移动电话普及率更高; 2G从短信开始引入了移动数据业务。 2G技术使得各种移动电话网络能够提供诸如短信，图片消息和MMS（多媒体消息）的服务。所有通过2G发送的文本消息都是数字加密的，允许传输数据，只有预期的接收者才能接收和阅读。


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