Unlocking the bootloader or flashing a new ROM completely wipes the internal storage.
Native VoLTE can sometimes require configuration tweaks depending on your carrier. 2. Resurrection Remix OS (RR) 5.8.x Opposite F3 Nougat Update Forum Xda
The Oppo F3 was released with Android 6.0 Marshmallow and ColorOS 3.0. Unlocking the bootloader or flashing a new ROM
Rooting the Oppo F3 proved to be a major challenge. The phone lacked a fastboot mode, and many standard one-click root apps were ineffective against its MediaTek (MT6750T) chipset. Root strategies were available for Marshmallow, but they largely did not work on Nougat, forcing users to consider a downgrade for root access. The community explored alternative tools like mtkclient to work around Oppo's locked-down bootloader. Opposite F3 Nougat Update Forum Xda