After iPhone 6 has been used for a long time, there will be some problems, such as cannot turn on, won't charge, black screen, and so on. These problems always trouble users. The issue that iPhone won't turn on annoys people because you don't use your iPhone as usual. Sometimes, your iPhone is black screen abruptly. Maybe you just need some data information at that time. Many people have ever experienced these situations? So how can iPhone 6 users solve the problem simply and quickly? Here are some reasons of these problems and solutions to iPhone won't turn on or charge..