10 Things to Do Before Installing iOS 9.3.5

Read App Reviews & Install Updates

If you're moving to iOS 9 for the first time, you'll want to look into updating your applications with support for the operating system. 

In the months since the iOS 9 release in September, developers have rolled out a steady stream of iOS 9 support updates. You'll want to investigate these updates. If reviews are good, you'll want to install them so that your device is ready for iOS 9 and iOS 9.3.5.

If you're already on iOS 9, note that iOS 9.3 support updates have started rolling out. So you'll want to do the same. Read reviews and install support updates/bug fixes if necessary. These reviews will also alert you to any problems apps might be having after the iOS 9.3.5 release.