Prepare Before Installing iOS 9.0.1
If you are already on iOS 9 this is a small update, and the odds are good that you can install it and be up and running in less than 10 minutes, but you should still prepare. If you are coming from iOS 8.4.1, it's even more important.
Use this guide to get ready for the iOS 9.0.1 update, which will walk you through steps to avoid problems and to recover if you run into any of them.
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