Help with AT Commands

I want to use the AT commands to interact with the 5G module. How to know the specific device file ( e.g tty1, tty2 ) that should be used to interact with the 5G module. ?
In other words, I want to know the serial device name to be given to applications like ‘minicom’, so that I can interact with the 5G module using AT commands.

Additionally, the /dev folder in linux PC does not contain any ttyUSBX files rather it contains ttyX files . Is that a problem?

I tried using several ttyx (e.g tty0,tty1 ) with minicom , but as so the terminal becomes unresponsive when I specify ttyx as the serial device name