iOS 5.0.1 is the first update to Apple 's iOS 5 , which brought the notifications tray , increased performance and iCloud to the iPad , iPhone and iPod touch . iOS 5.0.1 was released to update and fix problems that drained the iPhone 's battery . Users of Apple 's iPhone 5 and other iPhone 5 operated phones reported shorter battery life . Apple claimed that iPhone 5 had battery performance issues .
iOS 5.0.1 was released to update and fix problems that drained the iPhone 's battery . Users of Apple 's iPhone 5 and other iPhone 5 operated phones reported shorter battery life . Apple claimed that iPhone 5 had battery performance issues .