1. When the LED is blinking slowly (every 5 seconds):
   BLUE LED: the AT&T network service is connected and the Main Wi-Fi network is enabled. AMBER LED: the AT&T network service is disconnected or the Main Wi-Fi network is disabled.
   
2. When the LED is blinking quickly (double-blink)
   BLUE LED: the device is transferring data.
   
3. When the LED is alternating a fast
   BLUE and AMBER blink: The device firmware is being updated.