root@stm32mp1-hexabitzv2-mx:~/LTE_1/ubxlib/port/platform/linux/mcu/posix/runner/issam/build# ./issam_LTE 
U_CELL: initialising with enable power pin not connected, PWR_ON pin not connected and VInt pin not connected.
AT

OK
AT

OK
U_CELL_PWR: powering on, module is already on.
ATE0

OK
AT+CMEE=2

OK
AT+UDCONF=1,0

OK
ATI9

02.00,A01.22

OK
AT&C1

OK
AT&D0

OK
AT&K0

OK
AT+UPSV=0

OK
AT+UGPRF?

+UGPRF:2,0,""

OK
AT+CFUN=4

OK
U_PORT_PPP: listening for pppd on socket 127.0.0.1:5000.
Opened device with return code 0.
Bringing up the network...
U_CELL_NET: preparing to register/connect...
AT+CREG=2

OK
AT+CGREG=2

OK
AT+CEREG=4

OK
AT+CIMI
U_PORT_PPP: pppd has connected to socket.

234502106062261

OK
U_CELL_NET: user-specified APN is "TM".
AT+CGDCONT=1,"IP","TM"

OK
AT+UAUTHREQ=1,0,"",""

OK
AT+CGDCONT=2,"IP","TM"

OK
U_CELL_NET: setting automatic network selection mode...
AT+COPS?

+COPS: 0

OK
AT+CFUN=1

OK
AT+CREG?

+CREG: 0,"0000","0000",0

OK
-1: NReg
AT+CGREG?

+CGREG: 2,0,"0000","0000"

OK
-1: NReg
AT+CEREG?

+CEREG: 4,0,"0000","00000000", 0,0,0,"00000000","00000000"

OK
-1: NReg

+CREG: 5,"35c5","00dcf406",7

+CEREG: 5,"35c5","00dcf406",7

+CREG: 5,"35C5","00DC"

+CGREG: 4,"35C5","00DC"
7: RegR
7: RegR
0: RegR
-1: Unk 0
AT+COPS=3,0

OK
AT+COPS?

+COPS: 0,0,"Orange F",7

OK
AT+CGATT?

+CGATT:1

OK
AT+CGACT?

+CGACT: 0,0

OK
AT+CGACT=1,1

OK
AT+CGACT?

+CGACT: 1,1

OK
AT+CGACT?

+CGACT: 1,1

OK
AT+CGACT=1,2

+CME ERROR: operation not allowed
U_CELL_NET: unable to activate a PDP context, is APN "TM" correct?
AT+CEER

+CEER:No Error Call

OK
AT+CFUN=4

OK

+CREG: 0,"0000","0000",0

+CEREG: 0,"0000","00000000", 0,,,"00000000","00000000"

+CREG: 0,"0000","0000"

+CGREG: 0,"0000","0000"
U_CELL_NET: connection attempt stopped after 6 second(s).
-1: NReg
-1: NReg
Unable to bring up the network!
Closing device...
-1: NReg
Segmentation fault (core dumped)