Transitioning functional hardware from CE back to Android to support legacy apps.
Re: Downgrade DX80 from CE8.3.1 to Android - Cisco Community dx80.ce8.2.0-syn213b.rel.pkg
The unit must typically be running a version of CE 8.2 (such as 8.2.1 or 8.2.2) before the conversion package can be applied. Availability and Deferral Status Transitioning functional hardware from CE back to Android
The syn213b package is not a standard update; it is a bridge. It specifically converts a DX80 running to Android version 10.2.5-213 . dx80.ce8.2.0-syn213b.rel.pkg