Apple releases iOS 12.4.7 for older devices
Apple released iOS version 12.4.7 for older devices that don’t support the latest iOS 13.5 update.
The iOS 12.4.7 update is only 49.4 MB large, includes the latest security updates, and is recommended for all users. It’s compatible with the iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air (1st generation), iPad mini 2, iPad mini 3, and the iPod touch (6th generation).
To check for the update, go to Settings -> General -> Software Update.