: Open your phone's dialer and enter the code *#3988691# .
If you are troubleshooting hardware or signal issues, Oppo devices include a built-in diagnostic tool: oppo-network-unlock-tool-v-1-0-full-free-download-my-blog
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 : Open your phone's dialer and enter the code *#3988691#
: Dial *#899# to open the factory test menu. Technicians use this to verify internal hardware without needing external diagnostic software. oppo-network-unlock-tool-v-1-0-full-free-download-my-blog