Get Familiar with iOS 12.5.2 & Older Updates
If you chose not to install older versions of iOS, you'll want to get familiar with them before you install iOS 12.5.2 on your device. If you skipped one or more of these updates, their changes are baked into your version of iOS 12.5.2.
We've put together a guide that will take you through all of the major changes from iOS 12.1, iOS 12.1.1, iOS 12.1.2, iOS 12.1.3, iOS 12.1.4, iOS 12.2, iOS 12.3, iOS 12.3.1, iOS 12.3.2, iOS 12.4, and iOS 12.4.1. Take a look at it.
We've also released a detailed guide that goes through the key features found in iOS 12.4, iOS 12.4.1, iOS 12.4.2, iOS 12.4.3, iOS 12.4.4, iOS 12.4.5, iOS 12.4.6, iOS 12.4.7, iOS 12.4.8, iOS 12.4.9, iOS 12.5, iOS 12.5.1, and iOS 12.5.2 itself. Take a look at that too.
Make sure you dig in and get familiar with everything before you make your move. This way, you won't be caught off guard by any of the changes.