If you see only a pac file, you’ll need a different tool (OPPO Pac Flasher). For , choose the SP Flash Tool compatible scatter version.
Check the OPPO Community for the latest user-verified ROM links.
There is no official 7.1.2 update . Any "7.1.2" firmware found online is likely a Custom ROM (like LineageOS) or an unofficial port.
Power off your device. Press and hold Volume Down + Power simultaneously until the recovery menu appears.
The progress bar resumed at 95%. 96... 97... 98... 99...