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Command +CGACT=[<state> [,<cid>[,<cid>[,…]]]] Possible response(s) OK ERROR +CGACT? +CGACT: <cid>, <state> [<CR><LF>+CGACT: <cid>, <state> +CGACT: (list of supported <state>s) AT +CGACT=? AT+CGACT=? +CGATT: (0, 1) OK AT+CGACT? +CGACT: 1,0 +CGACT: 2,0 +CGACT: 3,0 OK AT+CGACT=1 ERROR // GPRS network not present . In some GPRS networks (for example - Germany) +CGACT is not supported. ATD*99# command can be used to get a connection. 2.60 AT+CGATT, GPRS attach/detach request Command AT+CGATT= [<state>] Possible response(s) OK ERROR AT+CGATT? +CGATT: <state> AT+CGATT=? +CGATT: (list of supported <state>s) AT+CGATT=? +CGATT: (0, 1) OK AT+CGATT? +CGATT: 0 OK g18 Modem Integration and Application Developers Guide version 2.0 Page 172