Miui 8 Oppo F1s

: In TWRP, go to "Wipe" and select "Advanced Wipe." Check System, Data, and Cache (do NOT wipe internal storage if your ROM is saved there).

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: You must have TWRP (Team Win Recovery Project) installed to flash the ROM file. Backup Data : Flashing a new OS will wipe all personal data . miui 8 oppo f1s