@superceleron
@goenjoy
@zonggestsu
Hi
I am working with Vim3l LTE module it’s able to detect sim and showing network. When I am checking UART port it’s generating 4 UART port so can you please tell which UART is for send SMS.
Hi, well i cant help you here since i do not have a LTE module to try it out 
For that type of information you need to talk with a khadas staff like @goenjoy .