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
Re: Downgrade DX80 from CE8.3.1 to Android - Cisco Community dx80.ce8.2.0-syn213b.rel.pkg
Transitioning functional hardware from CE back to Android to support legacy apps. The unit must typically be running a version of CE 8