According to Apple’s latest practice, they stopped verifying IOS 13.6 today, which means users can’t downgrade to this version (only IOS 13.6.1 is available at present). < / P > < p > stop signing means that users can no longer download outdated operating systems from Apple’s servers. It is customary for apple to stop signing old code regularly after releasing new versions of IOS to prevent users from installing previous IOS versions. This practice can protect users from new threats and ensure that the latest software is running on the device. < / P > < p > if nothing unexpected, this IOS 13.6.1 will be the last update of IOS 13, because Apple’s focus is on IOS 14, and its official version is expected to be released in the middle and late part of next month. < / P > < p > IOS 13.6.1 updates many problems, such as solving a problem that unnecessary system data files will not be automatically deleted when the storage space is insufficient, and a thermal management problem, which causes some iPhone monitors to show green color. < / P > < p > currently, IOS and iPad OS 13.6.1 updates can be applied online through settings on all eligible devices. To access the updates, click settings & gt; general & gt; software update.