An interface display method, comprising: obtaining, by a call application, a first phone number of a peer end of a call; after a first data source application is authenticated successfully, by the call application, obtaining, by the call application from the first data source application, first user description information corresponding to the first phone number, wherein the first user description information is used to record information about a user corresponding to the first phone number; and displaying, by the call application, the first user description information in a call-related interface of the first phone number, wherein successfully authenticating the first data source application comprises: obtaining authentication information, by the call application, of the first data source application, wherein the authentication information comprises a packet name and a signature; and authenticating the authentication information of the first data source application successfully, wherein successfully authenticating, by the call application, the authentication information of the first data source application comprises: searching, by the call application, for the packet name from a preset whitelist; and if the packet name is found, determining that a signature corresponding to the packet name in the whitelist is consistent with the signature in the authentication information. obtaining, by a call application, a first phone number of a peer end of a call; after a first data source application is authenticated successfully, by the call application, obtaining, by the call application from the first data source application, first user description information corresponding to the first phone number, wherein the first user description information is used to record information about a user corresponding to the first phone number; and displaying, by the call application, the first user description information in a call-related interface of the first phone number, wherein successfully authenticating the first data source application comprises: obtaining authentication information, by the call application, of the first data source application, wherein the authentication information comprises a packet name and a signature; and authenticating the authentication information of the first data source application successfully, wherein successfully authenticating, by the call application, the authentication information of the first data source application comprises: searching, by the call application, for the packet name from a preset whitelist; and if the packet name is found, determining that a signature corresponding to the packet name in the whitelist is consistent with the signature in the authentication information. obtaining authentication information, by the call application, of the first data source application, wherein the authentication information comprises a packet name and a signature; and authenticating the authentication information of the first data source application successfully, wherein successfully authenticating, by the call application, the authentication information of the first data source application comprises: searching, by the call application, for the packet name from a preset whitelist; and if the packet name is found, determining that a signature corresponding to the packet name in the whitelist is consistent with the signature in the authentication information. searching, by the call application, for the packet name from a preset whitelist; and if the packet name is found, determining that a signature corresponding to the packet name in the whitelist is consistent with the signature in the authentication information.