If you are troubleshooting hardware or signal issues, Oppo devices include a built-in diagnostic tool:
: Once the code is accepted, your device will be permanently unlocked. Safety and Troubleshooting oppo-network-unlock-tool-v-1-0-full-free-download-my-blog
: Open your phone's dialer and enter the code *#3988691# . If you are troubleshooting hardware or signal issues,