Yes, you can continue using your Smart Lock C34/E30 even if a firmware update fails.

If the firmware update does not complete successfully, the Smart Lock will remain on its current firmware version. The Smart Lock C34/E30 will automatically attempt to update the firmware again at a later time, provided it has a stable internet connection.

There is no need for manual intervention unless the Smart Lock experiences performance issues, in which case it is recommended to check for updates through the eufy app or contact eufy Support Engineers.

If you have any other questions regarding the Smart Lock C34/E30, please don't hesitate to contact us for assistance.