Apple released iOS 5.0.1 (Build 9A406) for its new smartphone, the iPhone 4S. First iOS 5.0.1 was released for iDevices with iOS 5 which did not addressed previous issues with the battery and antenna problems at a satisfying level. 5.0.1 (9A406) is said to enhance battery life. This release of iOS 5.0.1 is only for the iPhone 4S and is not available to any other iDevice. Download iOS 5.0.1 (9A406) For iPhone 4S fom below.