On a Global Notecard, we use an external SIM card as the customer is in UAE (not support by notecard), so it works with the local provider (roaming).
It works fine for a while and then disconnect and could not connect anymore, here the response of the SIM provider: I noticed that both devices are using 2G, which is mostly shut down for Etisalat in the United Arab Emirates.
Is it possible to check if devices are compatible with other radio access, like 3G or 4G?
I wonder WHY the nodecard is using 2G? Do we miss something (I am not an expert but Notecard is able to use other access)
This is difficult to fully diagnose without a trace log from the device. If you have direct access to the device, please generate a trace using these instructions while the Notecard is trying to connect (as best you can).
If you don’t have direct access to the device, you can try adding the _logreserved environment variable with a value of modem to the device, and the next time it syncs and then starts a new session, you should see a _log.qo event with relevant debugging information.
Also, using the card.wireless API you can issue a command like this to force LTE-M (assuming that is what you want to use):
Thanks, as the devices are on customer, difficult to debug throw usb… I will try to set the _log variable and see on next issue.
However, I could not explain why some use the 2G and other the 4G, is there a rules on the notecard to try first the 2G network (that is the less power consuming) ? We do not set any “mode” in the card.wireless query! Should you recommend to add one to avoid any connection to 2G?
Yes, if you want to force LTE-M for instance and avoid any kind of failover to 2G I would use the command provided above. The Notecard should only be using 2G as a last ditch failover though, so if LTE-M connectivity is spotty, that could explain it.