Mine doesn't do that either. It is red when I charge it and is green when it's charged. If I miss a call, it blinks Blue (I think) and it blinks blue when I turn on Bluetooth.
The strange part of that is it blinks blue whether or not I have a bluetooth device connected to it. I was used to my last couple of phones that blinked blue when my headset was connected to it. I've often wondered about that.
I had to turn my phone off to get a Nap in before work. I work midnight shift. I noticed the led light was constantly red,no blinking. Mine blinks blue when in use period w/ or w/out my bluetooth. But stops blinking when phone goes into sleep mode. My bluetooth blinks blue also when its on. Rapid blue blinks when its in use.Red when I turn it off & red blue flashing when in search/compatible mode. Jo