Hi @ensar, think you could help me out? I’m having a similar issue where AT#ECM=1,0 returns a non-verbose error and I have no data connection. Here is the info you request further up in this thread prior to the AT#ECM=1,0 command.
AT+CMEE=2
OK
AT+CGMR
M0F.660006
OK
AT#USBCFG?
#USBCFG: 4
OK
AT+CREG?
+CREG: 0,1
OK
AT#ECM?
#ECM: 0,0
OK
AT+CPIN?
+CPIN: READY
OK
AT+CGDCONT?
+CGDCONT: 1,"IPV4V6","NXTGENPHONE","",0,0,0,0
+CGDCONT: 2,"IPV4V6","ims","",0,0,0,0
+CGDCONT: 3,"IPV4V6","sos","",0,0,0,1
OK
AT+CSQ
+CSQ: 17,3
Here is my set up process for CDC_ECM with an att sim
AT#USBCFG=4
AT+CGDCONT=1,"IPV4V6","NXTGENPHONE"
AT#ECM=1,0
Here is what I’m seeing after the AT#ECM=1,0 command
AT#ECM?
#ECM: 0,0
OK
AT#ECM=1,0
ERROR
AT#ECM?
#ECM: 0,1