Ok my iphone is not charging when you plug it in but you can charge it when it has low battery sometimes under 20% most of the time under 10% but i have to do somethings like hold the home button and plug it in to charge and stuff like that but it sometimes doesn't work. It doesn't sync with itunes and is not detected by computer. the battery can hold a charge but it can be the battery. so what do i need to change in my iphone.