There's a secret code that can disable demo mode on some Oppo devices:
This code may not work on all Oppo devices, but it's worth trying.
Most Oppo demo units come pre-installed with a specific application designed to let store staff switch the phone back to "User Mode" easily. oppo demo mode remove
Some OPPO demo units have a hidden "Demo Apk."
A: If the dialer code fails, it means the Retail Mode software is blocking access to the Engineer Menu. In this case, you will need to perform a Hard Reset (Method 3) to wipe the device completely. There's a secret code that can disable demo
Verdict: Removing Demo Mode is essential for restoring full functionality to a device that has been reset or stuck in a retail display state. While the process is generally straightforward, it can be frustrating if the device requests a password that the user does not have.
A: Yes. Demo units often have their IMEI numbers blacklisted or the radio disabled. Removing demo mode does not automatically enable cellular service—you may still need to flash a modem firmware. This code may not work on all Oppo
If the phone requires a demo mode password or is managed by a store, contact OPPO customer support or the retailer. They can provide a special unlock code or tool.