AT+CESQ
AT+CEREG?



This log include without yellow wire hardware.

AT%XSIM?
%XSIM: 0
OK
AT+CFUN=P1PPP
ERROR
AT+CFUN=1
OK
AT%XSIM?
%XSIM: 0
OK
AT+CFUN?
+CFUN: 1
OK
AT+CFUN=1
OK
AT+CGSN=1
+CGSN: "352656100336125"
OK
AT+CGMI
Nordic Semiconductor ASA
OK
AT+CGMM
nRF9160-SICA
OK
AT+CGMR
mfw_nrf9160_1.1.0
OK
AT+CEMODE?
ERROR
AT+CEMODE?
+CEMODE: 0
OK
AT%XCBAND=?
%XCBAND: (1,2,3,4,5,8,12,13,17,19,20,25,26,28,66)
OK
AT+CMEE?
+CMEE: 0
OK
AT+CMEE=1
OK
AT+CNEC?
+CNEC: 0
OK
AT+CNEC=24
OK
AT+CGEREP?
+CGEREP: 0,0
OK
AT+CGDCONT?
OK
AT+CGACT?
OK
AT+CGEREP=1
OK
AT+CIND=1,1,1
OK
AT+CEREG=2
OK
AT+CEREG?
+CEREG: 2,90,"FFFE","FFFFFFFF",9
OK
AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
AT+CESQ=1
+CESQ: 99,99,255,255,255,255
OK
AT%CESQ=1
OK
AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
AT%XSIM=1
ERROR
AT%XSIM=1
OK
AT%XSIM?
%XSIM: 0
OK
AT%XSIM=1
ERROR
AT%XSIM=1
OK
AT%XSIM?
%XSIM: 0
OK
AT%XSIM?
%XSIM: 0
OK
AT+CPIN?


With yellow 

AT
OK
AT%CFUN?
ERROR
[00:07:07.852,233] <err> at_host: Could not send AT command to modem: -8
AT+CFUN?
+CFUN: 1
OK
AT+CGSN=1
+CGSN: "352656100336208"
OK
AT+CGMI
Nordic Semiconductor ASA
OK
AT+CGMM
nRF9160-SICA
OK
AT+CGMR
mfw_nrf9160_1.1.0
OK
AT+CEMODE?
+CEMODE: 2
OK
AT%XCBAND=?
%XCBAND: (1,2,3,4,5,8,12,13,14,17,18,19,20,25,26,28,66)
OK
AT+CMEE?
+CMEE: 0
OK
AT+CMEE=1
OK
AT+CNEC?
+CNEC: 0
OK
AT+CNEC=24
OK
AT+CGEREP?
+CGEREP: 0,0
OK
AT+CGDCONT?
OK
AT+CGACT?
OK
AT+CGEREP=1
OK
AT+CIND=1,1,1
OK
AT+CEREG=2
OK
AT+CEREG?
+CEREG: 2,90,"FFFE","FFFFFFFF",7
OK
AT%CESQ=1
OK
AT+CESQ
+CESQ: 99,99,255,255,255,255
OK
AT%XSIM=1
OK
AT%XSIM?
%XSIM: 0
OK
AT%XSIM?
%XSIM: 0
OK
AT+CIMI
ERROR
[00:11:58.040,374] <err> at_host: Could not send AT command to modem: -8
AT+CIMI
ERROR
[00:12:05.043,975] <err> at_host: Could not send AT command to modem: -8
AT+CPINR="SIM PIN"
ERROR
[00:12:27.767,028] <err> at_host: Could not send AT command to modem: -8
AT+CPIN?