Set Aside Some Free Time to Update
The iOS 9.0.2 update is small but you're going to want to set aside some quiet time to install it. Especially if you're coming from iOS 8 or the iOS 9.1 beta.
Put 30-40 minutes of free time aside for the download and installation process. This way, you won't be distracted if something pops up during the installation or if iOS 9.0.2 problems strike your device right after the installation is complete.
You'll want to do a little bit of testing right after the update is done to make sure your core group of applications are functioning properly. You'll also want to make sure your connections look good and your battery isn't draining abnormally.
You won't be able to do all of this in 10 minutes or with a ton of distractions. Take your time with this upgrade.
And please, make sure you download it over a fast connection. iOS 9.0.2 isn't a huge update but it could still take awhile.
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