: Once the code is accepted, your device will be permanently unlocked. Safety and Troubleshooting
: Dial *#899# to open the factory test menu. Technicians use this to verify internal hardware without needing external diagnostic software.
: Open your phone's dialer and enter the code *#3988691# .
For those looking to unlock an Oppo device, the most reliable and secure method is using an official unlock code rather than third-party tools that may contain malware or damage your device's firmware. Official Unlocking Procedure
: Once the code is accepted, your device will be permanently unlocked. Safety and Troubleshooting
: Dial *#899# to open the factory test menu. Technicians use this to verify internal hardware without needing external diagnostic software.
: Open your phone's dialer and enter the code *#3988691# .
For those looking to unlock an Oppo device, the most reliable and secure method is using an official unlock code rather than third-party tools that may contain malware or damage your device's firmware. Official Unlocking Procedure