AT指令，用于GSM通信模块，可以发短信，打电话，接电话，上网等，我们的手机差不多也是用这个。-AT commands for GSM communication module, you can send text messages, phone calls, phone, Internet, etc., we also used the phone about this.

GSM规范详解 详细介绍了手机GSM 规约 和通信协议-Detailed specification details the GSM mobile phone GSM protocols and communication protocols

MTK平台软件安装、SMT后段测试、_组装测试、手机通信检查-MTK平台生产软件使用说明.doc-MTK mobile phone production process descr iption. Rar