Intelimax+4G User Manual
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The modem will automatically reboot after sending the response.
IMPORTANT:
Modem firmware requires +CNMI=2,1 settings for getting notified when new SMS is
available. Due to cellular module’s behaviour on +CNMI command, any +CNMI write
command via the modem serial port would break the modem SMS command function
and the change cannot be saved if modem reboots. So please be cautious in using the
AT+CNMI write command over the serial port.