If your device has a basic software-level demo mode, you can often disable it via Developer Options Enable Developer Options About Phone Build Number
If your device is a strict "Live Demo Unit" sent directly from the factory to a retail store, the methods above might be locked out. In this scenario, you will need a computer and specialized unlocking software. Prerequisites: A Windows PC or Laptop. An original Oppo USB data cable. installed on your PC. oppo demo mode remove
Look for a toggle labeled or Factory Mode and switch it off. 2. Using the Master Code (*#899#) If your device has a basic software-level demo