Users cannot change passwords, fingerprints, or network configurations permanently.
Retailers use a specific version of ColorOS to showcase the phone’s capabilities. Demo Mode typically: Plays a continuous "Retail Loop" video. Wipes user data and settings after a period of inactivity. Disables the ability to set a screen lock or fingerprint.
Getting stuck in Demo Mode is frustrating, but Oppo makes it relatively easy to fix compared to other brands. By dialing *#899# , you can usually toggle the Retail switch and use your phone normally.