I have an iPhone 6. It won't let me download any apps, or view my camera roll. Tried restarting phone 100 times and logging out of app store?

I have an iPhone 6. It won't let me download any apps, or view my camera roll. Tried restarting phone 100 times and logging out of app store?

The only thing I can think of is that you don't have good enough internet or there's something wrong with your Apple account.