my god, wtf is going on with this phone. ive had horrible battery since day one. Ive got a I4 and im jailbroken and unlocked. No i dont use any installed crap on my phone other basic apps. I even turned off email push and turn the screen brightness all the way down and still wastes battery like its nothing. Honestly if i wanted to without trying i could go 100-0% in a day....easily.