Oppo F1s Firmware 'link' Download 7-1-2 -

originally launched with Android 5.1 (Lollipop). Due to its age and chipset (MediaTek MT6755), newer official Android versions are not supported.

I couldn’t find a specific article matching the exact phrase . However, here’s what that likely refers to and how you can safely find the firmware: Oppo F1s Firmware Download 7-1-2