Before beginning, ensure you have gathered all necessary tools and backed up any accessible data, as flashing will completely erase the phone.
I should also mention the specific model number, A59s, and perhaps note if there are different variants of this model that require different firmware versions. Checking if there are different color variations or hardware differences that affect the firmware compatibility. oppo a59s flash file global link
To help you find the correct software for your device, here is the information regarding the (Model: CPH1611) Global/International firmware. Before beginning, ensure you have gathered all necessary
If you proceed with flashing a "global" link found on forums, ensure you have the following: OPPO A59s price, specs and reviews - Giztop specs and reviews - Giztop