How to Prepare for iOS 11.4
If you haven't installed iOS 11.4 on your iPhone 7 or iPhone 7 Plus yet, make sure you do some prep work before you make your move. It'll help you avoid problems.
Again, there's no way to predict how the iOS 11.4 update will perform on your phone. You could have a flawless experience or, if you're unlucky, you could run into an assortment of bugs and/or performance issues.
There's no way to guarantee a problem-free transition from iOS 10 to iOS 11.4 or iOS 11.0/iOS 11.0.1/iOS 11.0.2/iOS 11.0.3/iOS 11.1/iOS 11.1.1/iOS 11.1.2/iOS 11.2/iOS 11.2.1/iOS 11.2.2/iOS 11.2.5/iOS 11.2.6/iOS 11.3/iOS 11.3.1 to iOS 11.4, but you can shift the odds in your favor if you take some time to prepare yourself and your device for the move.
To assist you, we've put together a list of things to do before installing iOS 11.4 on your iPhone 7 or iPhone 7 Plus.
You don't need to follow every step, but you'll absolutely want to backup your data before jumping to the new operating system.