Is it possible to update the card firmware?

For user safety, the card is flashed once and is not updated again. This eliminates the risk of counterfeit firmware and the possible theft of funds.
The ability to update the software of a hardware wallet means that you need to trust the wallet manufacturer and hope that there is never an update which compromises your keys.
In the case of Tangem, the card is flashed only once, and the firmware has been audited by the independent Swiss company Kudelski Security. Moreover, the card can prove that it has the precise firmware that was audited. This is one of the wallet's unique features that makes Tangem the most secure and trusted wallet in the world.