Things to Do Before Installing iOS 9.2.1 Early
If you do decide to install the developer or public iOS 9.2.1 beta ahead of the update's release date, make sure you do some prep work before you install. A little prep work will go a long way towards preventing issues and headaches.
We've put together a detailed guide that will take you through the process we've used in the past. You don't need to follow every single step on here but at the very least you'll want to backup your important files and data to ensure their safety.
These tips are going to be especially important for novice iOS users and those trying out early software for the first time. If you fall into that category, make sure you prepare.
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