That could work! Here are some more specific steps for how to do this on a GrapheneOS device (assuming you have root access):

1. Open a terminal window by pressing Ctrl+Alt+T or going to Applications > Accessories > Terminal.

2. Type in the following command and press Enter: `su` (without quotes). This will open a superuser prompt.

3. If you're not already logged into root, type your password when prompted. Otherwise, just hit Enter.

4. Type in the following commands one by one and press Enter after each one:

- `cd /etc/network` (to navigate to the network configuration directory)

- `vi wpa_supplicant.conf` (to open the Wi-Fi configuration file)

- Add the following lines at the end of the file: `ssid="your_wifi_name" psk="your_wifi_password"` (replacing "your_wifi_name" and "your_wifi_password" with your own Wi-Fi network name and password)

- Save and close the file by typing `:wq` (without quotes)