I just received my update and was really happy about the performance. Battery use was back to 4.1 standarts. Two days later it changes and now my phone eats up battery like a 13 yo junk food addict eats burgers. Is a complete factory reset the answer? I have about 4% ph battery usage in standby (vs 1% before). I thought 4.3 was bad but this s^*! Any input will be greatly appreciated!