Metal smart card with integrated components for registering said smart card on a mobile device

A smart card comprising:

• a card body;
• and
• an insert,
• the card body comprising a metal layer having a first face, a second face opposite the first face, and a blind cavity open on the first face and defining a periphery on said first face,
• the insert being inserted into the cavity and comprising
• an electronic module having an external face flush with the first face of the metal layer and comprising:
• a contact surface disposed on the external face and configured to allow contact-based communication with an external terminal, the external contact surface having a contour of which a gap with the periphery of the cavity on the first face of the metal layer is less than or equal to 0.5 mm, and
• a microcircuit configured to register a unique code associated with data representative of the smart card,
• a magnetic shielding layer, and
• a radio-frequency antenna electrically connected to the microcircuit and disposed between the contact surface of the electronic module and the magnetic shielding layer.