Following the release of iOS 13.3.1 today, Apple have released iOS 12.4.5 to all iPhone, iPad, and iPod touch devices that do not run iOS 13. This means that any iPad, iPhone, or iPod touch that is unable to run iOS 13 is getting iOS 12.4.5.
According to the release notes, iOS 12.4.5 includes bug fixes and security improvements. Apple recommends that all users download and update to iOS 12.4.5.
iOS 12.4.5 is available now and is compatible with all of the same models currently running any other version of iOS 12, aside from the devices that are able to run iOS 13. For example, an iPhone 11 is not able to update/downgrade to iOS 12.4.5. This update is solely for devices that cannot run iOS 13. You can find out what model iPhone or iPod touch you have by navigating to Settings > General > About and you’ll see you iPhone model under “Model Name”.
- Any iPhone including and under the iPhone 6 (e.g. 6, 6 Plus, 5S)
- iPod touch (6th Generation)
You can install iOS 12.4.5 by navigating to Settings > General > Software Update and clicking the “Download and Install” button or by connecting your iPhone or iPod touch to a computer and installing the update via iTunes.