Open your computer's command prompt in your ADB/Fastboot folder and run: fastboot oem unlock (Follow on-screen prompts to confirm).
Once both files are successfully flashed, select the Reboot System option. oppo f1s firmware download 712 work
With your custom recovery ready and your files on your SD card, you are ready to install Android 7.1.2. Step-by-Step Flashing Open your computer's command prompt in your ADB/Fastboot
To successfully download and install a working Android 7.1.2 firmware on your Oppo F1s (A1601), you will need to rely on custom ROMs, as the official stock software ended on Android 6.0. Step-by-Step Flashing To successfully download and install a
Occasionally, custom ROMs fail to read the device IMEI. Ensure you have backed up your NVRAM/EFS partition in TWRP before starting so you can easily restore your network connectivity.
Keep your battery charged to at least 70% to prevent power failures during the process.