Oppo R9sk Global — Firmware
While holding the buttons, connect the phone to your PC via the USB cable.
Connect your phone to the PC and transfer your preferred custom ROM zip file (e.g., LineageOS or an adapted Project Elixir build) along with a (Google Apps) package. Go to Install , select the ROM zip, and swipe to confirm. Install the GApps zip immediately afterward. Reboot system. Troubleshooting Common Flashing Issues oppo r9sk global firmware