LG VX-6100

What does this mean? My phone will be on, but not in use, just closed sitting on my desk and I'll notice that the outside green light on the right side will just start randomly blinking. I know it doesn't mean a voicemail or text message indication because whenever the green light flashes I check the phone and there isn't a message.

The green light is the same green light that will light up when your battery is fully charged, or red if it isn't.

Thanks.