Dear Snowgum,
Thanks for your inquiry in Quectel forums.
I have checked two FW version EM12GPAR01A17M4G and EM12GPAR01A17M4G, and get the same results as you +CNMI: 2,2,0,0,0. So there may have some error information in the preliminary EM12 AT command guide. I will feedback it to our RD, and modified in released document. Thanks for your information. Thanks!
I believe that the manual has the correct setting, and the modem’s default is highly undesirable.
AT+CNMI=2,2,0,0,0 has the unfortunate consequence of incoming SMSs being lost completely. That will happen whenever the modem starts before software is able to catch the unsolicited text messages dumped to the command port.
Dear Snowgum,
About the issue, i have feedback to our RD, they will double check it. If it is the FW issue, they will modified it and release new FW; if it is the document issue, we will correct the document. Thanks!
But for this parameter, you can reset it with AT command. Thanks!