If you have a newer iOS device, it may have installed the operating system but never prompted you for your username and password. After going through the steps at http://wifi.brown.edu, if you are not prompted for a username and password, try the following:
- Go to Settings > Wi-Fi.
- Click the Brown-Guest network, then click back on Brown
- When prompted for your username and password, use your Brown username (e.g., jcarberr)