How to Prepare for the iPhone 6 iOS 9.2.1 Update
If you decide that you want iOS 9.2.1, you'll want to do some prep work. If you prep yourself and your device for iOS 9.2.1, you're going to be in much better shape after the installation process finishes up.
We've outlined the pre-installation process that we use for every single iOS update. We used it for the iPhone 6 iOS 9.2.1 update and we've come out of the release date without any scars.
The process includes some steps that take a few seconds of time but there are also some more involved steps. These are the most important and they include things like making a backup of your iPhone 6's data and files before making the jump.
It might seem like overkill for an update of this size but even small updates can have a huge impact on performance.
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