: The industry-standard tool for flashing MediaTek-based smartphones.
Oppo F1s (MT6755/MediaTek Helio P10) firmware provides the core operating system and functionality for this 2016-era "Selfie Expert" device. Oppo F1s Mt6755 Firmware
Always backup your current firmware (Readback in SP Flash Tool) before flashing. If you don’t have backup and the phone won’t boot, find a full stock ROM (not just OTA). Proceed at your own risk. Oppo F1s Mt6755 Firmware