LTE How why when what

Basic AT Commands: Some basic AT commands that we generally give before starting any UE testing are: AT+CIMI - Gives the IMSI of the SIM inserted in UE AT+CGSN- To check UE IMEI Commands to start tracing in MA AT+XSIO?  Gives the currently active variant. AT+XSIO=? Gives the available variant and attached port for tracing AT+TRACE=0 To stop tracing AT+TRACE=1 To start tracing