Windows MC7700 how to change to use serial?

Thank you for your help, tried a few of the options however, could not get any to really work as I was having trouble running a form off Linux on the SBC(Single-Board-Computer) to attempt to change the modes. Although after a few deletes, resets and re-installs the SBC seemed to picked up the serial ports however, have a few new problems.

If you were to have time here is the link for my new post otherwise have a great day!
Link: Windows MC7700, Cellular APN Settings and sending SMS using C#