4G LED turned on?

Hi

If I send the below AT Commands after TRB142 is turned on and sends RDY (Ready) and before the 4G LED is turned on (flashing) then I cannot detect an incoming SMS with “+CMTI: “ME”,0”, even if “AT+CEREG” returns “+CEREG: 0,1” (Registered, home network).
But if I wait to the 4G LED is turned on (flashing) it works fine.
Any ideas about this issue?

ATE0
AT+CNMI=1,1,0,0,1
AT+CMGF=1
AT+CSCS=“GSM”
AT+QURCCFG=“urcport”,“uart1”
AT+QCSQ=0
AT+CREG=0
AT+CGREG=0
AT+CEREG=0
AT+IFC=0,0
AT&W

Br

Bert

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