Install iOS 12.4.4 If You Just Bought AirPods 2
If you bought a pair of AirPods 2, or you're planning to buy a pair in the near future, and you skipped iOS 12.2, iOS 12.3, iOS 12.3.1, iOS 12.3.2, iOS 12.4, iOS 12.4.1, iOS 12.4.2, and iOS 12.4.3, you need to download iOS 12.4.4.
The iOS 12.2 brought support for AirPods 2 which means your iPhone needs to be running iOS 12.2 or later in order to use them.
The AirPods 2 feature a new H1 chip that doubles talk time, makes switching between your devices twice as fast connecting to your phone to take a call 1.5x faster, powers voice activated Siri, and also helps to deliver 30% less lag when playing games.
If you're interested in buying a pair, head here for more information about Apple's earbuds.