Oppo A78 Refurbished Firmware -

Oppo’s update policy for the A-series is not flagship-tier. You generally get starting from the release date.

Refurbished units may arrive with outdated software, carrier bloatware, or "bugs" from improper previous updates. Firmware flashing can: Repair devices stuck on the OPPO logo. oppo a78 refurbished firmware

Let me know your (check Settings → About → Model or on the back of the phone), and I can help you search more safely. Oppo’s update policy for the A-series is not flagship-tier