I have become very aware of turning Blue Tooth off when I don't need it. I am convinced that the 15-18 hours a day of battery life I am getting is due to this and turning off WiFi when I can't hit a network. Lately the Bluetooth is turning itself back on every time i open a text message. Very strange. I have Toggle Blue Tooth on my home screen and have seen a text come in and there is no change. When I open the text the BT notification comes on immediately. Any ideas on this one? What could be the possible connection between text messages and BT?