Learn How to Downgrade
For a short time, Apple will allow you to downgrade back to iOS 12.4. This is useful if iOS 12.4.1 starts giving you problems.
The iOS 12.4 downgrade path won't be open forever. Apple will close it off at some point and it will do so without warning.
This is why we recommend getting familiar with the downgrade process now so that you aren't scrambling in the days ahead.
To help you out we've put together a guide to the downgrade. Go over the steps, memorize them, and you'll be in great shape if and when iOS 12.4.1 starts causing issues.