Press and hold the buttons until the OPPO logo appears. Select English as the language. Choose Install from storage device > From phone storage . Select the downloaded firmware file and tap OK to confirm. Common Fixes for Update Issues
Always check the OPPO India Support ROM Page first for your specific model (CPH1609).
If the device hangs during the first boot, wait at least 10–15 minutes. If it persists, return to Recovery Mode and perform a Wipe data (this will erase your files).