Hi, I state that I sifted through the forum to find the solution to my problem. I have an ec21-e device which was configured correctly with unicom china sim with unim2m.njm2mapn apn. I tried to use an Italian Windtre sim with success, but when I restart the configured APN profile it goes back to the Chinese one. Excuse my ignorance, but I’m probably doing something wrong.
What is the correct procedure to define the correct APN definitively even after a reboot?
after having fiddled around a bit now it happens to me that if I use the unicom sim it doesn’t work because another apn automatically loads
if I use the wind tre sim instead the unique profile loads.
I think I messed it up a bit
Can you give me advice or if a firmware update could be useful? I thank you in advance
/* Use ATV1 to set the response format */
[2023-09-08 18:42:20:689_S:] ATV1
[2023-09-08 18:42:20:689_R:] ATV1
[2023-09-08 18:42:20:689_R:] OK
/* Use ATE1 to enable echo mode */
[2023-09-08 18:42:20:709_S:] ATE1
[2023-09-08 18:42:20:759_R:] ATE1
[2023-09-08 18:42:20:759_R:] OK
/* Use AT+CMEE=2 to enable result code and use verbose values */
[2023-09-08 18:42:20:769_S:] AT+CMEE=2
[2023-09-08 18:42:20:769_R:] AT+CMEE=2
[2023-09-08 18:42:20:769_R:] OK
/* Get the baudrate, if the value is 0 (auto baudrate), then it will be set to 115200 (fixed baudrate) to assure reliable communication and avoid any problems caused by undetermined baudrate between DCE and DTE, value of IPR should be saved with AT&W */
[2023-09-08 18:42:20:779_S:] AT+IPR?
[2023-09-08 18:42:20:789_R:] AT+IPR?
[2023-09-08 18:42:20:799_R:] +IPR: 115200
[2023-09-08 18:42:20:799_R:] OK
/* Use ATI to get module information of Manufacturer ID, Device module and Firmware version */
[2023-09-08 18:42:20:819_S:] ATI
[2023-09-08 18:42:20:819_R:] ATI
[2023-09-08 18:42:20:829_R:] Quectel
[2023-09-08 18:42:20:829_R:] EC21
[2023-09-08 18:42:20:829_R:] Revision: EC21EFAR06A06M4G
[2023-09-08 18:42:20:829_R:] OK
/* Use AT+GSN to query the IMEI of module */
[2023-09-08 18:42:20:858_S:] AT+GSN
[2023-09-08 18:42:20:869_R:] AT+GSN
[2023-09-08 18:42:20:869_R:] 869101059923603
[2023-09-08 18:42:20:869_R:] OK
[2023-09-08 18:42:20:878_S:] ATI
[2023-09-08 18:42:20:878_R:] ATI
[2023-09-08 18:42:20:878_R:] Quectel
[2023-09-08 18:42:20:878_R:] EC21
[2023-09-08 18:42:20:878_R:] Revision: EC21EFAR06A06M4G
[2023-09-08 18:42:20:878_R:] OK
[2023-09-08 18:42:20:899_S:] AT+QURCCFG=“URCPORT”,“usbat”
[2023-09-08 18:42:20:899_R:] AT+QURCCFG=“URCPORT”,“usbat”
[2023-09-08 18:42:20:909_R:] OK
/* Use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2023-09-08 18:42:20:939_S:] AT+CPIN?
[2023-09-08 18:42:20:949_R:] AT+CPIN?
[2023-09-08 18:42:20:958_R:] +CPIN: READY
[2023-09-08 18:42:20:958_R:] OK
/* Use AT+CIMI to query the IMSI of SIM card */
[2023-09-08 18:42:20:968_S:] AT+CIMI
[2023-09-08 18:42:20:978_R:] AT+CIMI
[2023-09-08 18:42:20:988_R:] 208090079365743
[2023-09-08 18:42:20:988_R:] OK
/* Use AT+QCCID to query ICCID number of SIM card */
[2023-09-08 18:42:21:008_S:] AT+QCCID
[2023-09-08 18:42:21:018_R:] AT+QCCID
[2023-09-08 18:42:21:018_R:] +QCCID: 89852002021113427969
[2023-09-08 18:42:21:018_R:] OK
/* Use AT+CSQ to query current signal quality */
[2023-09-08 18:42:21:038_S:] AT+CSQ
[2023-09-08 18:42:21:048_R:] AT+CSQ
[2023-09-08 18:42:21:048_R:] +CSQ: 20,0
[2023-09-08 18:42:21:048_R:] OK
/* Use AT+CREG? /AT+CGREG? to query the network registration status. */
[2023-09-08 18:42:21:068_S:] AT+CREG?
[2023-09-08 18:42:21:078_R:] AT+CREG?
[2023-09-08 18:42:21:078_R:] +CREG: 2,5,“9C8B”,“B56A”,0
[2023-09-08 18:42:21:078_R:] OK
[2023-09-08 18:42:21:088_S:] AT+CGREG?
[2023-09-08 18:42:21:098_R:] AT+CGREG?
[2023-09-08 18:42:21:098_R:] +CGREG: 0,5
[2023-09-08 18:42:21:098_R:] OK
/* Use AT+COPS? to query current Network Operator */
[2023-09-08 18:42:21:108_S:] AT+COPS?
[2023-09-08 18:42:21:118_R:] AT+COPS?
[2023-09-08 18:42:21:128_R:] +COPS: 0,0,“vodafone IT”,0
[2023-09-08 18:42:21:128_R:] OK
/Use AT+CEREG? to query current EPS Network Registration Status/
[2023-09-08 18:42:21:148_S:] AT+CEREG?
[2023-09-08 18:42:21:158_R:] AT+CEREG?
[2023-09-08 18:42:21:158_R:] +CEREG: 0,4
[2023-09-08 18:42:21:158_R:] OK
[2023-09-08 18:43:12:283_S:] AT+CGDCONT?
[2023-09-08 18:43:15:723_R:] AT+CGDCONT?
[2023-09-08 18:43:15:733_R:] +CGDCONT: 1,“IP”,“bicsapn”,“0.0.0.0”,0,0,0,0
[2023-09-08 18:43:15:733_R:] +CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
[2023-09-08 18:43:15:733_R:] +CGDCONT: 3,“IPV4V6”,“SOS”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1
[2023-09-08 18:43:15:733_R:] OK
[2023-09-08 18:44:43:165_S:] AT+QMBNCFG=“List”
[2023-09-08 18:44:45:751_R:] AT+QMBNCFG=“List”
[2023-09-08 18:44:45:760_R:] ERROR
[2023-09-08 18:44:50:626_S:] AT+QMBNCFG=?
[2023-09-08 18:44:50:776_R:] AT+QMBNCFG=?
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “List”
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “Select”[,]
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “Deactivate”
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “AutoSel”[,(0,1)]
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “Delete”,“”
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “Add”,“”
[2023-09-08 18:44:50:786_R:] +QMBNCFG: “List_all”
[2023-09-08 18:44:50:786_R:] OK
[2023-09-08 18:45:01:561_S:] AT+QMBNCFG=“List”
[2023-09-08 18:45:01:571_R:] AT+QMBNCFG=“List”
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,0,1,1,“ROW_Generic_3GPP”,0x05010824,201806201
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,1,0,0,“Reliance_OpnMkt”,0x05011B4B,201801051
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,2,0,0,“TW_Mobile_China_VoLTE”,0x05800301,202005121
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,3,0,0,“Bouygues_France_VoLTE”,0x05800101,202004151
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,4,0,0,“Telstra-Commercial_VoLTE”,0x05800716,202105191
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,5,0,0,“Commercial-Smartfren”,0x05012509,202001041
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,6,0,0,“VF_Germany_VoLTE”,0x05010444,202005121
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,7,0,0,“Swis_switzerland_VoLTE_VoWiFi”,0x05010421,201712231
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,8,0,0,“TF_Spain_VoLTE”,0x05800D43,202106171
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,9,0,0,“Commercial-DT-VOLTE”,0x05011F27,202006291
[2023-09-08 18:45:01:591_R:] +QMBNCFG: “List”,10,0,0,“Telekom_Slovenije_VoLTE”,0x0501FD01,202108041
[2023-09-08 18:45:01:591_R:] OK
[2023-09-08 18:45:19:466_S:] AT+QMBNCFG=“Autosel”
[2023-09-08 18:45:20:789_R:] AT+QMBNCFG=“Autosel”
[2023-09-08 18:45:20:799_R:] +QMBNCFG: “AutoSel”,0
[2023-09-08 18:45:20:799_R:] OK
[2023-09-08 18:45:45:843_S:] AT+QMBNCFG=“Autosel”,1
[2023-09-08 18:45:45:863_R:] AT+QMBNCFG=“Autosel”,1
[2023-09-08 18:45:45:863_R:] OK
[2023-09-08 18:45:49:429_S:] AT+QMBNCFG=“Autosel”
[2023-09-08 18:45:50:848_R:] AT+QMBNCFG=“Autosel”
[2023-09-08 18:45:50:858_R:] +QMBNCFG: “AutoSel”,1
[2023-09-08 18:45:50:858_R:] OK
[2023-09-08 18:46:05:443_S:] at+cfun=0
[2023-09-08 18:46:05:844_R:] at+cfun=0
[2023-09-08 18:46:07:846_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:07:896_R:] OK
[2023-09-08 18:46:07:896_R:] +CREG: 0
[2023-09-08 18:46:07:976_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:12:439_S:] at+cfun=1
[2023-09-08 18:46:12:439_R:] at+cfun=1
[2023-09-08 18:46:12:690_R:] OK
[2023-09-08 18:46:13:370_R:] +CPIN: READY
[2023-09-08 18:46:13:380_R:] +QUSIM: 1
[2023-09-08 18:46:13:390_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:13:390_R:] +CREG: 2
[2023-09-08 18:46:13:510_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:13:915_R:] +CREG: 5,“9C8B”,“B56A”,0
[2023-09-08 18:46:13:921_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:13:961_R:] +QIND: SMS DONE
[2023-09-08 18:46:14:093_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:15:424_R:] +QIND: PB DONE
[2023-09-08 18:46:15:434_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:15:554_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:20:710_S:] at+cfun=0
[2023-09-08 18:46:22:828_R:] at+cfun=0
/* use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2023-09-08 18:46:23:701_S:] AT+CPIN?
[2023-09-08 18:46:24:866_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:24:894_R:] OK
[2023-09-08 18:46:24:896_R:] +CREG: 0
[2023-09-08 18:46:24:982_R:] DSR:0 CTS:0 (RI:0) DCD:0
/* Use AT+CPIN?/AT+CREG?/AT+CGREG? to query the SIM status and network registration status */
[2023-09-08 18:46:41:453_S:] AT+CPIN?
[2023-09-08 18:46:41:460_R:] AT+CPIN?
[2023-09-08 18:46:41:460_R:] +CME ERROR: SIM failure
[2023-09-08 18:46:41:480_S:] AT+CREG?
[2023-09-08 18:46:41:480_R:] AT+CREG?
[2023-09-08 18:46:41:490_R:] +CREG: 2,0
[2023-09-08 18:46:41:490_R:] OK
[2023-09-08 18:46:41:510_S:] AT+CGREG?
[2023-09-08 18:46:41:516_R:] AT+CGREG?
[2023-09-08 18:46:41:516_R:] +CGREG: 0,0
[2023-09-08 18:46:41:516_R:] OK
/* Use AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0 to set APN as “UNIM2M.NJM2MAPN”,user name as “”,password as “” */
[2023-09-08 18:46:41:537_S:] AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0
[2023-09-08 18:46:41:547_R:] AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0
[2023-09-08 18:46:41:557_R:] OK
/* Activate context profile */
[2023-09-08 18:46:41:577_S:] AT+QIACT=1
[2023-09-08 18:46:41:587_R:] AT+QIACT=1
[2023-09-08 18:46:41:607_R:] ERROR
/* Query the status of the context profile */
[2023-09-08 18:46:41:617_S:] AT+QIACT?
[2023-09-08 18:46:41:627_R:] AT+QIACT?
[2023-09-08 18:46:41:637_R:] OK
[2023-09-08 18:46:48:813_S:] at+cfun=1
[2023-09-08 18:46:48:823_R:] at+cfun=1
[2023-09-08 18:46:49:054_R:] OK
[2023-09-08 18:46:49:694_R:] +CPIN: READY
[2023-09-08 18:46:49:694_R:] +QUSIM: 1
[2023-09-08 18:46:49:704_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:49:724_R:] +CREG: 2
[2023-09-08 18:46:49:904_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:50:305_R:] +QIND: SMS DONE
[2023-09-08 18:46:50:305_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:50:425_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:50:625_R:] +CREG: 5,“9C8B”,“B56B”,0
[2023-09-08 18:46:50:625_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:50:745_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:46:51:495_R:] +QIND: PB DONE
[2023-09-08 18:46:51:495_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:46:51:616_R:] DSR:0 CTS:0 (RI:0) DCD:0
/* Use AT+CPIN?/AT+CREG?/AT+CGREG? to query the SIM status and network registration status */
[2023-09-08 18:46:55:105_S:] AT+CPIN?
[2023-09-08 18:46:55:296_R:] AT+CPIN?
[2023-09-08 18:46:55:296_R:] +CPIN: READY
[2023-09-08 18:46:55:296_R:] OK
[2023-09-08 18:46:55:306_S:] AT+CREG?
[2023-09-08 18:46:55:356_R:] AT+CREG?
[2023-09-08 18:46:55:356_R:] +CREG: 2,5,“9C8B”,“B56B”,0
[2023-09-08 18:46:55:356_R:] OK
[2023-09-08 18:46:55:366_S:] AT+CGREG?
[2023-09-08 18:46:55:416_R:] AT+CGREG?
[2023-09-08 18:46:55:416_R:] +CGREG: 0,5
[2023-09-08 18:46:55:416_R:] OK
/* Use AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0 to set APN as “UNIM2M.NJM2MAPN”,user name as “”,password as “” */
[2023-09-08 18:46:55:436_S:] AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0
[2023-09-08 18:46:55:466_R:] AT+QICSGP=1,1,“UNIM2M.NJM2MAPN”,“”,“”,0
[2023-09-08 18:46:55:466_R:] OK
/* Activate context profile */
[2023-09-08 18:46:55:486_S:] AT+QIACT=1
[2023-09-08 18:46:55:526_R:] AT+QIACT=1
[2023-09-08 18:47:01:394_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:47:01:404_R:] ERROR
[2023-09-08 18:47:01:404_R:] +CREG: 3
/* Query the status of the context profile */
[2023-09-08 18:47:01:414_S:] AT+QIACT?
[2023-09-08 18:47:01:524_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:47:03:475_R:] +CREG: 2
[2023-09-08 18:47:03:484_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:47:03:604_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:47:05:503_R:] AT+QIACT?
[2023-09-08 18:47:05:512_R:] OK
[2023-09-08 18:47:56:223_R:] +CREG: 5,“9C8B”,“B56B”,0
[2023-09-08 18:47:56:223_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:47:56:343_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:47:59:471_S:] AT+QICSGP=1,1,“unim2m.njm2mapn”,“”,“”,0
[2023-09-08 18:48:00:523_R:] AT+QICSGP=1,1,“unim2m.njm2mapn”,“”,“”,0
[2023-09-08 18:48:00:533_R:] OK
[2023-09-08 18:48:17:333_S:] AT+cgcont=?
[2023-09-08 18:48:17:924_R:] AT+cgcont=?
[2023-09-08 18:48:17:974_R:] ERROR
[2023-09-08 18:48:37:733_S:] AT+cgdcont=?
[2023-09-08 18:48:41:983_R:] AT+cgdcont=?
[2023-09-08 18:48:41:983_R:] +CGDCONT: (1-24),“IP”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:48:41:983_R:] +CGDCONT: (1-24),“PPP”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:48:41:983_R:] +CGDCONT: (1-24),“IPV6”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:48:41:983_R:] +CGDCONT: (1-24),“IPV4V6”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:48:41:983_R:] OK
[2023-09-08 18:48:46:263_S:] AT+cgdcont?
[2023-09-08 18:48:47:987_R:] AT+cgdcont?
[2023-09-08 18:48:47:987_R:] +CGDCONT: 1,“IP”,“UNIM2M.NJM2MAPN”,“0.0.0.0”,0,0,0,0
[2023-09-08 18:48:47:987_R:] +CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
[2023-09-08 18:48:47:987_R:] +CGDCONT: 3,“IPV4V6”,“SOS”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1
[2023-09-08 18:48:47:987_R:] OK
[2023-09-08 18:49:34:331_S:] AT+cgdcont=1,“IP”,“unim2m.njm2mapn”,“0.0.0.0”,0,0,0,0
[2023-09-08 18:49:36:020_R:] AT+cgdcont=1,“IP”,“unim2m.njm2mapn”,“0.0.0.0”,0,0,0,0
[2023-09-08 18:49:36:020_R:] OK
[2023-09-08 18:49:41:484_S:] AT+cgdcont=?
[2023-09-08 18:49:42:006_R:] AT+cgdcont=?
[2023-09-08 18:49:42:006_R:] +CGDCONT: (1-24),“IP”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:49:42:006_R:] +CGDCONT: (1-24),“PPP”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:49:42:006_R:] +CGDCONT: (1-24),“IPV6”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:49:42:006_R:] +CGDCONT: (1-24),“IPV4V6”,(0-2),(0-4),(0-1),(0-1)
[2023-09-08 18:49:42:006_R:] OK
[2023-09-08 18:49:46:198_S:] AT+cgdcont?
[2023-09-08 18:49:48:023_R:] AT+cgdcont?
[2023-09-08 18:49:48:023_R:] +CGDCONT: 1,“IP”,“unim2m.njm2mapn”,“0.0.0.0”,0,0,0,0
[2023-09-08 18:49:48:023_R:] +CGDCONT: 2,“IPV4V6”,“ims”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,0
[2023-09-08 18:49:48:023_R:] +CGDCONT: 3,“IPV4V6”,“SOS”,“0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0”,0,0,0,1
[2023-09-08 18:49:48:023_R:] OK
[2023-09-08 18:50:05:542_S:] at+cfun=0
[2023-09-08 18:50:06:053_R:] at+cfun=0
[2023-09-08 18:50:07:728_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:07:778_R:] OK
[2023-09-08 18:50:07:778_R:] +CREG: 0
[2023-09-08 18:50:07:848_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:50:11:192_S:] at+cfun=1
[2023-09-08 18:50:11:202_R:] at+cfun=1
[2023-09-08 18:50:11:443_R:] OK
[2023-09-08 18:50:12:084_R:] +CPIN: READY
[2023-09-08 18:50:12:093_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:12:103_R:] +QUSIM: 1
[2023-09-08 18:50:12:183_R:] +CREG: 2
[2023-09-08 18:50:12:303_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:50:12:714_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:12:714_R:] +QIND: SMS DONE
[2023-09-08 18:50:12:834_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:50:13:885_R:] +QIND: PB DONE
[2023-09-08 18:50:13:895_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:13:965_R:] +CREG: 5,“9C8B”,“B56A”,0
[2023-09-08 18:50:14:096_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:50:23:961_R:] +CREG: 3
[2023-09-08 18:50:23:971_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:24:081_R:] DSR:0 CTS:0 (RI:0) DCD:0
[2023-09-08 18:50:26:652_R:] +CREG: 2
[2023-09-08 18:50:26:661_R:] DSR:0 CTS:0 (RI:1) DCD:0
[2023-09-08 18:50:26:782_R:] DSR:0 CTS:0 (RI:0) DCD:0
/* use AT+CPIN? to query the SIM card status : SIM card inserted or not, locked or unlocked */
[2023-09-08 18:50:36:037_S:] AT+CPIN?
[2023-09-08 18:50:36:040_R:] AT+CPIN?
[2023-09-08 18:50:36:050_R:] +CPIN: READY
[2023-09-08 18:50:36:050_R:] OK
/Use AT+CEREG? to query current EPS Network Registration Status/
[2023-09-08 18:50:36:060_S:] AT+CEREG?
[2023-09-08 18:50:36:070_R:] AT+CEREG?
[2023-09-08 18:50:36:080_R:] +CEREG: 0,4
[2023-09-08 18:50:36:080_R:] OK
/* use AT+CSQ to query current signal quality */
[2023-09-08 18:50:36:090_S:] AT+CSQ
[2023-09-08 18:50:36:100_R:] AT+CSQ
[2023-09-08 18:50:36:100_R:] +CSQ: 31,0
[2023-09-08 18:50:36:100_R:] OK
/* use AT+CREG? /AT+CGREG? to query the network registration status, if the return value is [0,1] or [0,5], it is successfully registered, other value is fail to register */
[2023-09-08 18:50:36:110_S:] AT+CREG?
[2023-09-08 18:50:36:120_R:] AT+CREG?
[2023-09-08 18:50:36:120_R:] +CREG: 2,2
[2023-09-08 18:50:36:120_R:] OK
[2023-09-08 18:50:36:130_S:] AT+CGREG?
[2023-09-08 18:50:36:130_R:] AT+CGREG?
[2023-09-08 18:50:36:137_R:] +CGREG: 0,2
[2023-09-08 18:50:36:137_R:] OK
/* use AT+CREG? /AT+CGREG? to query the network registration status, if the return value is [0,1] or [0,5], it is successfully registered, other value is fail to register */
[2023-09-08 18:50:37:157_S:] AT+CREG?
[2023-09-08 18:50:40:688_R:] AT+CREG?
[2023-09-08 18:50:40:690_R:] +CREG: 2,2
[2023-09-08 18:50:40:690_R:] OK
[2023-09-08 18:50:40:699_S:] AT+CGREG?
[2023-09-08 18:50:40:699_R:] AT+CGREG?
[2023-09-08 18:50:40:699_R:] +CGREG: 0,2
[2023-09-08 18:50:40:699_R:] OK
