Since iOS 13 was released near the end of September, Apple has updated iOS 13 quite a few times already, iOS 13.1 came out on September 24th to address a few bugs that were lurking in the original release and iOS 13.1.1 followed soon after to fix some battery drain issues, and some issues with third party keyboards.

On Monday this week, Apple updated iOS 13 again with iOS 13.1.2 and as there is now so many versions, Apple has now stoped signing the earlier updates – mainly to encourage users to keep their devices up to date, which is important for security improvements.

Apple has stopped signing iOS 12.4.1, iOS 13.0 and iOS 13.1.1. iOS 13.1 is still being signed for now.