Some users on the carbon G+ page are having an issue with the blue LED flashing continuously since flashing the latest d2lte update. "A script didn't get included when d2 was moved over to d2lte". Carbon knows about this issue and it should be corrected in the next update,some have reported a workaround, plug your phone into a charger then unplug it and the blue light should stop immediately, I had this problem when I flashed the latest update.