Yes, wrong. Install picocom kmod-usb-serial-option
Then connect to the modem with picocom /dev/ttyUSB1 and send the AT commands.
Here you can see what needs to be configured for this modem: Quectel EC200T-CN LTE module not working in OpenWrt - #18 by AndrewZ
Check the current mode with AT+QCFG="usbnet", if you will see "3" there, change the mode with AT+QCFG="usbnet",1
Finally, send AT+QCFG="nat",1 followed by AT^RESET
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