Open the official management app (often found on the Apple App Store or Google Play Store ) and ensure your phone is paired with the lock via Bluetooth.
Look for a "Firmware Update" or "Advanced Settings" section. If you are doing a manual update, you may be prompted to select the .zip file from your phone's local storage. lokikey-s03-zip
If the app reports an "Invalid File" error, the .zip may be corrupted. Delete it and re-download a fresh copy. Open the official management app (often found on