Free up some disk space on your iPhone by either deleting your media files or by storing them at another location. iOS 9 requires a storage space of about 1.3 GB on your iPhone. Ample of space may be required to install the upgraded version of the operating system. When you download and install the new firmware on your device, you are notified of the need for free space. Plus, you should check and then upgrade your iOS device to the new iOS version to avoid problems later on. iOS 9 requires storage is not compatible, you should stop then and there from making an upgrade as it may harm your device. So, if you have an Apple device that operating system. You can also upgrade it for iPad Air 2 and iPad mini 2 and 3 efficiently. iOS 9 is currently available for iPhone 4s and models, which came afterward. Let's now have a detailed look at the key features of this powerful tool.Īnother thing you need to know when you are dealing with how to update iPhone 4/4s to iOS 9 hassle-free is the compatibility of your iOS device. The software enables you to either selectively or completely backup your iOS device data depending on your requirement. dr.fone is a trusted and 100% safe to use software that guarantees your data will be absolutely safe and secure with its Privacy Protection Policy. If not yet, you would require the recommended tool, dr.fone - iOS Data Backup & Restore to perform a full backup of your iPhone in just a few simple clicks. If you want to update iPhone 4s to iOS 9, then before do so, first ensure that you have made a complete backup of your iOS device. Part 1: 4 Things you Need to Know Before Updating iPhone 4/4S to iOS 9īefore we start updating our device, let's take a look at some tips and things that we should prepare before we update the iPhone.ġ. Part 2: 2 Ways to Update iPhone 4/4S to iOS 9 Successfully.

Part 1: 4 Things you Need to Know Before Updating iPhone 4/4S to iOS 9.

How to Update iPhone 4/4S to iOS 9 Easily.

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