| CPC H04W 8/205 (2013.01) [H04W 4/50 (2018.02); H04W 12/06 (2013.01); H04W 12/72 (2021.01)] | 20 Claims |

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1. An embedded subscriber identification module (eSIM) card change method, performed by a terminal device, comprising:
obtaining a user number and an embedded universal integrated circuit card (eUICC) identification; and
sending a card change request to a server, wherein the card change request comprises the user number and the eUICC identification;
receiving a card change success notification from the server; and
downloading an eSIM profile according to the card change success notification, wherein the eSIM profile is related to the user number and the eUICC identification.
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