iPad Air demo build to standard build

[Msagarwaal]

hi there,

Some days before I have purchased one iPad Air demo unit, but I am unable to change the demo function even after updating the iOS version to 9.02.

Please suggest.

Regards, Mohit

 

[J. A.41]

Connect your iPad to iTunes (computer) and restore it.

The instructions can be found here:
Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support

Don't restore from a backup.