Her has been using her iPhone for 2 years but its in perfect condition and she takes care of it. But she has been using a Mophie Juice case/charger for about the duration of the 2 years as well. i think for about 1 1/2 years it has been experiencing the typical battery problem where it drains fast or dies at like 50%. But recently it died and never came back on. it would show the dead battery icon with the usb and when its connected it would just show the dead battery. also her lock button doesn't work most of the time.