On your modem, you will find a label with important information regarding your service - To change the pre-defined password on the Wi-Fi, follow the steps below:
Step 1. Enter the modem's IP address (Log on address) in a browser window & press return.
Step 2. Enter the username and password as shown on the sticker.
Step 3. Once you have successfully logged in, select “WLAN”.
Step 4. Scroll to “WEP/WPA key” and enter your NEW Password.
Step 5. Click “Apply”.
It is best to use your device's default browser to complete this change.