This process can "brick" your device if not followed correctly. Proceed at your own risk.
: SP Flash Tool (Smart Phone Flash Tool) latest version.
If you are looking to refresh your device or fix software issues like bootloops, you can download the official stock ROMs for the A1601 model. These files are typically used with tools like for MediaTek-based versions. Oppo F1s Firmware Download - 7.1.2
To update your device to Android 7.1.2, you will need to download three essential components to your PC. 1. Firmware Package
Disclaimer: Flashing firmware carries a risk of bricking your device if done incorrectly. Follow the instructions precisely. The author is not responsible for data loss. Always use official Oppo tools where possible. This process can "brick" your device if not
. To run Android 7.1.2, you must use a custom ROM, such as LineageOS 14.1 Firmware and ROM Options Official Stock Firmware : Typically tops out at Android 6.0 (ColorOS 3.0)
Oppo’s security rollback protection. You are trying to downgrade from a newer security patch to an older one. Fix: You cannot downgrade via OTA. You must use SP Flash Tool and manually flash the preloader partition (dangerous - only if you know what you are doing). If you are looking to refresh your device
This report covers the official firmware package details, download sources, installation instructions, and precautions.