Install iOS 12.4.1 for Better iPhone Migration
Apple's iOS 12.4 update brought new wireless data migration when setting up a new iPhone. If you skipped iOS 12.4 and this is something you're interested in, think about downloading iOS 12.4.1.
This means you can wirelessly transfer data and migrate directly from an old iPhone to a new iPhone during the setup process.
So, if you're planning to upgrade to a new iPhone in the near future, you'll probably want to download the iOS 12.4.1 update today.