iPadOS 6.1.3 (build 10B329) is an official Apple over-the-air update for the iPad 2 (Mid 2012). The update package is 782.99 MB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: e29c9c1e7bcbaef39fd7c20abd7c607068d3f93c.zip.