Updating FiPy modem firmware for NB-IoT

[WilkinsSq]

I'm trying to update the firmware of my FiPy so it is compatible with NB-IoT. I'm using the following docs page:
https://docs.pycom.io/updatefirmware/ltemodem/#flash
Could anyone help me find the serial port used by my device through the ATOM IDE, as so far I'm not having much luck updating the firmware via USB, and none of the other options for updating the firmware are available to me.

[WilkinsSq]

Thanks very much @Gijs! I've managed to make it work

[Gijs]

Hi,
On the right hand side of the REPL window, you find +More, in the menu, there is list serial ports, this will return a list of serial ports and copy the serial port of your FiPy to the clipboard as well! You can directly paste that to the python command as the port.
Best,
Gijs