Method for authenticating and updating EUICC firmware version and related apparatus

A method for updating an embedded universal integrated circuit card (eUICC) firmware version implemented by a terminal device comprising an eUICC, the method comprising:

• sending first information to an event management server, wherein the first information comprises a target identifier;
• receiving a target event record from the event management server, wherein at least one of a first eUICC firmware version or a first issuer identifier in the target event record matches the target identifier;
• downloading an eUICC firmware version update package based on the target event record;
• and
• updating a firmware version of the eUICC based on the eUICC firmware version update package.

A terminal device, comprising:

• an embedded universal integrated circuit card (eUICC);
• a transceiver coupled to the eUICC and configured to:
• send first information to an event management server, wherein the first information comprises a target identifier;
• and
• receive a target event record from the event management server, wherein at least one of a first eUICC firmware version or a first issuer identifier in the target event record matches the target identifier;
• and
• a processor coupled to the transceiver and the eUICC and configured to:
• download an eUICC firmware version update package based on the target event record;
• and
• update a firmware version of the eUICC based on the eUICC firmware version update package.