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LTE Module SeriesEC25&EC21 AT Commands ManualEC25&EC21_AT_Commands_Manual 76 / 231ExampleAT+COPS=? //List all current network operators+COPS:(1,"CHN-UNICOM","UNICOM","46001",2),(1,"CHN-UNICOM","UNICOM","46001",0),(2,"CHN-UNICOM","UNICOM","46001",7),(1,"46011","46011","46011",7),(3,"CHINAMOBILE","CMCC","46000",0),,(0,1,2,3,4),(0,1,2)OKAT+COPS? //Query the currently selected network operator+COPS: 0,0,“CHN-UNICOM”,7OK6.2. AT+CREG Network RegistrationThe Read Command returns the network registration status. The write command sets whether or not topresent URC.AT+CREG Network Registration StatusTest CommandAT+CREG=?Response+CREG: (list of supported s)OKRead CommandAT+CREG?ResponseTA returns the status of result code presentation and aninteger which shows whether the network hascurrently indicated the registration of the ME. Locationinformation elements and are returned only when=2 and ME is registered on the network.+CREG: ,[,,[,]]OKIf there is any error related to ME functionality:+CME ERROR: Write CommandAT+CREG[=]ResponseTA controls the presentation of an unsolicited result code+CREG: when =1 and there is a change in the MEnetwork registration status.OKMaximum Response Time 300ms
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