Start a web browser, and access tendawifi.com:

• If you are required to enter a PIN code to unlock the SIM card, contact your ISP for the PIN code.
• If you are required to enter APN parameters manually, enter these parameters provided by your ISP.
• If the internet LED indicatoris still off after you finish the Quick Setup Wizard, your SIM card may run out of money.

If the problem persists, contact your ISP for help.