: Open your phone's dialer and enter the code *#3988691# .
To permanently unlock an Oppo device for any network, you can typically use the built-in region and SIM lock menus: oppo-network-unlock-tool-v-1-0-full-free-download-my-blog
: When prompted, type in the SIMLOCK or region unlock code you received. : 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
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