We are running the latest linux ubuntu version. We have successfully connected with several non-LTE technologies. We are using AT commands to communicate with the modem. For example the normal process of connecting to the internet that we have been using (AT commands) is:
-
AT!GSTATUS?
this checks a bunch of information regarding connection. When the computer boots and all our settings are good, we are able to connect to the internet automatically. -
AT!SELRAT=
so far, we have been using n = 5, 6, and 7 (“GSM and UMTS Only”, “LTE Only”, and “GSM, UMTS, LTE”, respectively). Only 5 and 7 have been able to connect to the internet. When 6 is selected (“LTE Only”) we have tried everything but with no success. -
AT!SCPROF=,"",1,0,0,0
our pid is set up as:
AT+CGDCONT=,“IP”,“Broadband”, since we are using AT&T -
AT!SCACT=1,
this is one of the problematic steps when using “LTE only”. it has worked in the past but it is not working any more. -
AT+CGATT=1
this one almost never works in “LTE only” mode.
These are the steps we take to get internet connectivity with the non-LTE technologies. We are wondering what additional steps or settings we have to change in order to connect to LTE. Any help is appreciated.