SIM300所有开发资料，AT指令，GPRS等PDF,硬件原理图等等。,SIM300 all development information, AT commands, GPRS, such as PDF, hardware schematics and so on.

sim300开发文档，主要包括电话接听和拨打、中英文短信的发送与读取、彩信的发送与读取等。-sim300 development documents, including telephone answering and call, send and read English SMS, MMS send and read.