完整电路图诺基亚2700手机的，开发手机和gprs等项目的可以根据这个图纸连接外设。stm32开发gprs通讯时借鉴的图。-The complete circuit diagram Nokia 2700 mobile phone, the development of the project such as mobile phones and gprs according to the drawings connected peripherals. Figure stm32 development gprs communication reference.