I have not tried this before , but it will be helpful to check out the Quectel EC200 series AT comma

I have not tried this before , but it will be helpful to check out the Quectel EC200 series AT commands documentation for detailed explanations of the +QMTCONN and +QMTSTAT responses, particularly error codes like "3" so you can find specific troubleshooting steps for this particular error code
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