( CNN ) -- Since Apple released iOS 7 , its completely revamped operating system for the iPhone , reviews have been mixed but mostly positive . Apple : No ID for ' white / black cause of death ' But has been rebooting iPhone with Apple 's iOS 7 . Some say this happens when iPhone 's battery is low .
Apple : No ID for ' white / black cause of death ' But has been rebooting iPhone with Apple 's iOS 7 . Some say this happens when iPhone 's battery is low .