iOS 12.4.7 is an update that Apple has made available for devices without iOS 13. This means that the update is for users of the iPhone 6, 6 Plus, 5s and older iPads. This is a small update with bug fixes. There is nothing to count on here. However, Apple constantly remembers the owners of these devices.
iOS 12.4.7 has been released together with the update with the number 13.5. Apple also decided to update those devices that did not get the current software last year. So this is an update designed for iPhone 6.6 Plus, SE (first generation) and iPad models Air, mini 2nd and 3rd generation and an iPod touch 6th generation.
iOS 12.4.7 to older iPhone and iPad are just bug fixes
The iOS 12.4.7 update is a minor software update. There are no new features here. Apple simply decided on older devices to introduce solutions to the errors found, including those related to security. Remember that Apple security patches are discussed at this site.
Wanting to download a new update on iPhone or iPad you have to go to Settings, General and Updates. There after a while, information about the new software will appear. They can be downloaded only when connected to a Wi-Fi network. Downloading using cellular data is not possible.
Also read: AirPods – tricks and functions that are worth knowing