instead of using your nano you can use a usb-serial module in combination
with this free tool QCOM_V1.6 http://www.rakwireless.com/en/download/WisLTE/Tools

Now you can enter and save all the AT commands and activate them by the push of a button or in a sequence and store as a script.

Very handy to test all AT commands

here you see the AT commands and the buttons 1-29
on the left the terminal with the modules response