If you are getting the green light on your Amazon echo, then it means that you are on a call or you are getting an incoming call. The green light is going to spin if you are talking to someone or when you are placing the call to someone else. The light will turn off once you hang up the phone. But sometimes when you hang up the call, you will see that the green light is still there. You try to make the light disappear but the light is still stiff or pulsating on the top of your device.