Hello mailinglist, I hope I'm right here with this question. We use the LTE-modem Sierra MC 77100 with Direct-IP Firmware in a standalone box. The box must connect to the internet by itself - so I must store the pin in the box.
I want make shure that the pin is not sent to the modem, when the SIM-card is changed. So the plan on power-back was: - switch on the modem - ask for the ICCID - compare ICCID with the stored one - if ICCID is unchanged, send the pin - if ICCID is changed, store it and wait for a new pin, since a person (who changed the SIM - why ever) must be close. But now I found out, that I get an error at the AT-interface, when I ask for the ICCID before sending the PIN. :-( And so I must try it and waste one try of the user, who should have 3 tries to enter the correct PIN. -> ATZ <- ATZ <- OK -> AT!ICCID? <- AT!ICCID? <- ERROR -> AT!SPN? <- AT!SPN? <- +CME ERROR: unknown -> AT+CPIN=**** <- AT+CPIN=**** <- OK -> AT!ICCID? <- AT!ICCID? <- !ICCID: 89490200000863940628 <- <- OK -> AT!SPN? <- AT!SPN? <- !SPN: 0, "Telekom.de" <- <- OK Is this a bug or a security topic? Does know anyone a trick or another way to find out a SIM-changing? I watching a switch at the SIM-slot, but the user can change the SIM also in the off-state of the box, so it will not help. At this moment I offer the removing of the pin in the web-gui to prepare the changing of the SIM, but this is not smart. :-( Here some information of the modem AT!UDINFO? AT!UDINFO? VID: 0x1199 PID: 0x68A3 Manufacturer: Sierra Wireless, Incorporated Product: MC7710 OK ATI ATI Manufacturer: Sierra Wireless, Incorporated Model: MC7710 Revision: SWI9200X_03.00.08.02AP R3715 CARMD-EN-10526 2011/11/14 18:42:43 IMEI: 358178040282370 IMEI SV: 7 FSN: CCQ1912249710 3GPP Release 8 +GCAP: +CGSM OK AT!GSTATUS? AT!GSTATUS? !GSTATUS: Current Time: 585 Temperature: 25 Bootup Time: 1 Mode: ONLINE System mode: LTE PS state: Attached LTE band: B20 LTE bw: 10 MHz LTE Rx chan: 6400 LTE Tx chan: 24400 EMM state: Registered Normal Service EMM connection:RRC Idle RSSI (dBm): -41 Tx Power: RSRP (dBm): -102 TAC: 40A2 (16546) RSRQ (dB): -16 Cell ID: 01901400 (26219520) SINR (dB): 4.4 OK AT&V AT&V &C: 1; &D: 2; &E: 0; &F: 0; &S: 0; &W: 0; E: 1; L: 0; M: 0; Q: 0; V: 1; X: 1; Z: 0; \Q: 3; \S: 0; \V: 0; O: 0; S0: 0; S2: 43; S3: 13; S4: 10; S5: 8; S6: 2; S7: 0; S8: 2; S9: 6; S10: 14; S11: 95; S30: 0; S103: 1; S104: 1; +FCLASS: 0; +ICF: 3,3; +IFC: 2,2; +IPR: 115200; +DR: 0; +DS: 0,0,2048,6; +CMEE: 2; +WS46: 12; +CFUN:; +CBST: 0,0,1; +CRLP: (61,61,48,6,0),(61,61,48,6,1),(240,240,52,6,2); +CV120: 1,1,1,0,0,0; +CHSN: 0,0,0,0; +CSSN: 0,0; +CREG: 0; +CGREG: 0; +CEREG: 0; +CSCS: "IRA"; +CSTA: 129; +CR: 0; +CRC: 0; +CGDCONT: (1,"IP","hallo","10.10.10.10",0,0); +CGDSCONT: ; +CGTFT: ; +CGEQREQ: ; +CGEQMIN: ; +CGEQOS: ; +CGQREQ: ; +CGQMIN: ; +CGEREP: 0,0; +CGDATA: "PPP"; +CGCLASS: "A"; +CGSMS: 3; +CSMS: 0; +CMGF: 0; +CSAS: 0; +CRES: 0; +CSCA: "+491710760000",145; +CSMP: ,,0,0; +CSDH: 0; +CSCB: 0,"",""; +FDD: 0; +FAR: 0; +FCL: 0; +FIT: 0,0; +ES: ,,; +ESA: 0,,,,0,0,255,; +CMOD: 0; +CEMODE: 0; +CVHU: 0; +CPIN: ,; +CMEC: 0,0,0,0; +CIND: 0,0,1,1,0,0,1,0; +CMER: 0,0,0,0,0; +CGATT: 1; +CGACT: 0; +CPBS: "SM"; +CPMS: "SM","SM","SM"; +CNMI: 0,0,0,0,0; +CMMS: 0; +FTS: 0; +FRS: 0; +FTH: 3; +FRH: 3; +FTM: 96; +FRM: 96; +CCUG: 0,0,0; +COPS: 0,0,""; +CUSD: 0; +CAOC: 1; +CCWA: 0; +CCLK: ""; +CPOL: 0,2,"",0,0,0,0; +CPLS: 0; +CTZR: 0; +CTZU: 0; +CLIP: 0; +COLP: 0; +CDIP: 0; +CLIR: 0; +CMUX: 0,0,5,31,10,3,30,10,2; !CMUX: 0,0,5,31,10,3,30,10,2 OK Greetings, Andreas Schigold
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