For most users, the "download" happens automatically through the System Updates
Firmware is not universal. A file for an Oppo A37 cannot be used on a Reno series device without causing permanent damage. Preparation: oppo firmware file download
Before proceeding, the device must be charged to at least 50% and backed up, as manual installations often wipe all user data. The "Flashing" Procedure For most users, the "download" happens automatically through