iPhone 4s iOS 9 Release: 7 Important Details

Apple's Made It Easier To Update

If you own a 16GB iPhone 4s, you can go into the iOS 9 release date with confidence. 

In years past, Apple made it difficult for 16GB iPhone and iPad users to download and install updates Over-the-Air. For instance iOS 8, Apple's current operating system, required more than 4GB of free space to install OTA. This year, with iOS 9, you'll only need 1.3GB of free space to install. 

The iPhone 4s iOS 9 update is also going to be smarter about how it approaches future iOS updates, iOS 9.x and otherwise. 

The device's iOS 9 update comes with a new feature that will automatically delete and reinstall applications so that you can install a new update without deleting apps and files to make room. 

You'll also be able to set it so that future iPhone 4s iOS 9 updates install when you're not using your phone or when you're sleeping.