I purchased a DIGI LTE-M module and subscribed to a AT&T data plan. I can connect and get a reply from the echo server. I can not send SMS text messages. AT&T says their IoT data plan does not support SMS Text messages. I get an error message. Anyone else had this experience? All I want to do is be able to send a SMS Text from my device to a cell phone. Would a DIGI LTE device work with an AT&T LTE North America data plan work? I would be curious if anyone has gotten the SMS example code to work with a LTE-M module with any service plan. Any help would be appreciated.