I have an AT&T M2M SIM card which I have used in multiple other modems successfully, but when I try to put it in my MC7455 and connect to the LTE network, I am unsuccessful.
I can see the SIM as online in the AT&T SIM dashboard they provide, and the ppp0 interface obtains an IP address successfully via wvdial, but it doesn’t seem like I am actually registered / connected to the network.
The APN is set correctly and here is the result of a few diagnostic AT commands sent to the modem:
ATIE Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C_02.24.05.06 r7040 CARMD-EV-FRMWR2 2017/05/19 06:23:09 MEID: 35907206237905 IMEI: 359072062379058 IMEI SV: 12 FSN: LQ823242490210 +GCAP: +CGSM OK AT+CSQ +CSQ: 17,99 OK AT+CGDCONT? +CGDCONT: 1,"IPV4V6","m2m.com.attz","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0 OK AT+CGREG? +CGREG: 0,1 OK
The AT!USBCOMP is set with the bitmask 50D, not sure if that makes a difference, I tried 100D as well and it had the same behavior.
Let me know if you need any more information, or want me to run any additional AT commands.
I’ve exhausted my troubleshooting methods and have scoured the web already, but no solutions I’ve found have been a help.
Thanks in advance.