声音和文本是作为比特流在手机和基站之间传送。短信息服务是一种协议,移动用户可利用它发送和接收文本。但是手机和个人数字助理(将计算机、手机、相机和音乐播放器合为一体)也可以通过GPRS(通用分组无线业务)来交换数据,例如 WAP Sound and text are transmitted as a bit stream between the handset and the base station. Short Message Service is a protocol that mobile users can use to send and receive text. But cell phones and personal digital assistants (computers, cell phones, cameras and music players together) can also exchange data over GPRS (General Packet Radio Services), such as WAP