lbs、agps流程

AT指令流程 +CTZV:19/1/8,8:59:6,23 +CIEV: service,  1 +CIEV: roam, 0 +CREG: 1 AT+CGDCONT=1,"IP","cmnet" AT+CGDCONT=1,"IP","cmnet" OK AT+CGACT=1 AT+CGACT=1 OK AT+CGACT? AT+CGACT? +CGACT: 1, 1 OK AT+QGNSSC=1

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