Backup Your Files
If you store important files on your iOS device, it's important that you make a backup before you install iOS 9.3.5.
Every time Apple releases an iOS update we hear horror stories. People lose files or precious photos/memories every time a new update rolls out. You don't want to this to happen to you. That's why it's important to make a backup, even if you're an iOS whiz. Fortunately, we've got you covered.
We have a guide that will walk you through the backup process using iTunes. If you don't want to go the iTunes route, we also have a guide that details the backup process via iCloud.
If you haven't backed up in awhile, use this time to make sure everything is in order before you make your move. This is especially important if you're moving to iOS 9.3.5 from iOS 9.3 or something older.