https://wccftech.com/download-ios-12-4-final-for-iphone-ipad-ipod-touch/

It’s here. You can now download iOS 12.4 final version for iPhone, iPad and iPod touch. It features a handful of changes which we’ve outlined in the changelog.

Pretty much all the noise right now surrounds iOS 13 and all the great features it brings to the table. But the harsh truth is this: the update won’t be available for everyone until later this year alongside new iPhones. This means that you have to make do with the current publicly available version of Apple’s software, and the latest one in the lineup, iOS 12.4, is now available for download.