I am trying to make a SMS application to send message to phone number from this C# application by using GSM modem, but it gives this error: +CME Error:PACM(AP),UNREGISTED OK OK +CME Error:PACM(AP),NOT_ALLOWED_SLO OK +CME Error:PACM(AP),NOT_ALLOWED_SLO OK +CME Error:PACM(AP),NOT_ALLOWED_SLO OK HI ERROR Here is my code: private void btnsend_Click(object sender, EventArgs e) { try { SerialPort sp = new SerialPort(); sp.PortName = txtport.Text;...
Originally asked by Learner_developer on Stack Exchange (stackoverflow) (CC BY-SA 4.0).
