OPPO implemented Anti-Rollback protection on the A5 2020. If you flash a loader/file/firmware that is older than your current version, you may trigger the ARB fuse, permanently bricking the device.
(Common International Variant): Downloadable from sites like Rom Developer and AZROM . oppo a5 2020 loader file
Free files often cause Sahara Fail: Error 6 . That means the loader is signed for a different OPPO model. OPPO implemented Anti-Rollback protection on the A5 2020
For an OPPO A5 2020 Go to product viewer dialog for this item. you may trigger the ARB fuse
Do not just Google "OPPO A5 2020 loader file download." You will get 404 errors or virus alerts.