BGS2T - EHS5T AT command difference | Thales IoT Developer Community

Yes it is not supported as you mentioned.
The code I tested is as follows.
There was a project where approximately 700 pieces 4G terminals would be purchased. This was the reason we tried.

The company that produces the device(Natural Gas Volume Corrector) that drives the modem(with AT command) did not support this issue.
I think we will not be able to communicate due to the AT+GMR command.

Is there any other method we can try to establish communication?

Thanks.

protected void startApp() throws MIDletStateChangeException {
    boolean serialPortOpened        = false;
    try {
        String strCOM                = "comm:" + comPort + ";baudrate=" + baudRate + ";bitsperchar=" + dataBit + ";stopbits=" + stopBit + ";parity=" + parity + "";
        commConn                    = (CommConnection)Connector.open(strCOM);
        inStream                    = commConn.openInputStream();
        outStream                    = commConn.openOutputStream();
        serialPortOpened            = true;
    }
    catch (Exception e) {
        
    }
    if (serialPortOpened) {
        while (true) {
            try {
                Thread.sleep(20);
                int numberOfBytesToRead            = inStream.available();
                if (numberOfBytesToRead > 0) {
                    byte[] message                = new byte[numberOfBytesToRead];
                    inStream.read(message);
                    messageStr                    = "";
                    for (int i = 0; i < message.length; i++) {
                        messageStr                += (char)message[i];
                    }
                    getCommandResponse(messageStr);
                }
            } catch (Exception e) {
                
            }
        }
    }
}

ATCommandResponseListener m_ATResponseListener = new ATCommandResponseListener() {
    public void ATResponse(String response) {
        try {
            RS232ATCommandBridge.outStream.write(response.getBytes());
        } catch (Exception e) {

        }
    }
};

private void getCommandResponse(String request) {
    try {
        if (request.length() > 1) {
            if (request.indexOf("AT+GMR") > -1) {
                request    = request.substring(0, request.indexOf("GMR")) + "C" + request.substring(request.indexOf("GMR"), request.length());
            }
            synchronized (atCommand) {
                try {
                    atCommand.cancelCommand();
                } catch (Exception e) {
                }
                atCommand.send(request, m_ATResponseListener);
            }
        }
    }
    catch (Exception e) {
        
    }
}