send AT Command to my 3G USB Modem without disconnecting the Modem
<p>To clarify things I will explain all the process. 
I want to get information about my 3G USB Modem such as IMEI,IMSI,Manufacturer...
I have worked with Serial Port and I opened the Port, and I asked the Modem with AT Command and all works Good, but the only problem that I encountered that when my modem has the status connected and I want to open the Port the system appears a message Error "Port already in use", so that why I should disconnect my modem and open the Port with my Application and get my information ! 
please any help to avoid this case disconnect and connect a modem,or any idea to make my Application more performance; I hope that I could explain my question.</p>
