Just above the upper-right corner of your screen, on the face of the Droid 2, there’s a small notification light that flashes information to you. It’s quite useful, because it works even when your screen is off. So just by checking this light, you can know whether the Droid 2 has something important to tell you. Here’s what the color codes mean:
Flashing green. You’ve got a notification, such as a missed call, a new email, a missed text, and so on, that you haven’t yet cleared.
Blue. You’ve got an incoming call. Most of the time you won’t need to pay attention to this, because your phone will ring or vibrate. But if you’ve got the ring and vibration turned off, it’s the only notice you’ll get that someone is calling.