To access certain parts of this website, you need to be an authenticated member of the Digital Forensics Community.
You can contact me hello@doubleblak.com
This article was written as a joint effort between the legendary Heather Mahalik and myself and posted on the Cellebrite website.
It aims to highlight a few ways of finding out when an iOS device was wiped.
You can access it from here : Upgrade From NULL - Detecting iOS Wipe Artifacts - Cellebrite