展讯平台GSM技术问答，展讯平台手机开发必备。-Spreadtrum GSM platform technical FAQ, spreadtrum development platform for mobile phones.

GSM通讯协议，在开发GSM、GPRS模块时必备资料，SIM900a,一块短信模块-The GSM communication protocol, in the development of GSM, the GPRS module necessary data, SIM900a, a short message module