Yesterday, my iPhone was disconnected from all apps, including WiFi and iTunes. When I try to log into my apps (Gmail, WiFi, iTunes, Facebook) it says my password is wrong, even though it is the correct password in each instance. It is an iPhone 6 and the storage is pretty much full, about ~200 MB free space. My OS is up to date - 10.2.1 Any ideas what is going on and how to fix?