indicators

Ok...i've looked around for the answer to this. I've never had an indicator light on my storm stay on until today. I've gotten indicators for email and the such, but now I have a green indicator on blinking. It wasn't on all day. I was putting contacts in my phone and then it just started blinking. i backed out to see if it was a message or something and...nothing. But my battery was low.

so is the green indicator for a low batter?

Doesn't make much sense, but other threads say its the coverage indicator...My setting for that is OFF.