Hi, slow flashing means it’s attempting to connect. You can reset it by pressing the button for more than 5 seconds, until the LED turns solid on, and then release the button. Is your Cisco 3602i by any chance a 5G-only router? Also, could you try a different router, or create an Hotspot on your phone and let OG connect to the hotspot? If nothing works, you can submit a support ticket to get it replaced.