Answers
How can I change the Wi-Fi network name / password on the CLEAR Hub Express and CLEAR Modem with Wi-Fi?
Since the CLEAR Hub Express and CLEAR Modem with Wi-Fi ships with a default network name and password, you can easily personalize the network name and password by logging into the Device Home Page at: http://192.168.15.1 (CLEAR Modem with Wi-Fi) or http://clearmodem. Your Default password is “CLEAR123” for the CLEAR Modem with Wi-Fi. Your Default password is “admin” for the CLEAR Hub Express.
Click on Basic -> Wi-Fi and customize your Network name (SSID) and Wi-Fi password on this page for the CLEAR Modem with Wi-Fi:

Click on Password on this Page for the CLEAR Hub Express

If you cannot connect your device via Wi-Fi, you can connect with an Ethernet cord and follow the same steps.