Please confirm the firmware version before the product upgrade. The firmware provided on our official website details the applicable product model. If you cannot determine whether the product is suitable for the firmware, please consult our customer service staff.
Example: If you product is T-priv3, you could not upgrade it use the firmware for T-priv.
If the product cannot be turned on or gets other failure because of the upgrade error or unmatched version file. Please try to upgrade it again and be sure to follow all the upgrade steps from our official website. If you can't find the product firmware from the official website, you could contact our customer service staff. We will provide you with the correct firmware.