In one embodiment, a method includes sending a request to a computing server from a mobile-client system for a multimedia object. The mobile-client system receives, from the computing server, a query in response to the request for SIM-card information of the mobile-client system. The mobile-client system executes an application in response to the query to access a SIM card of the mobile-client system and retrieve SIM-card information. The mobile-client system sends the retrieved SIM-card information to the computing server. The mobile-client system receives a multimedia object from the computing server, the multimedia object being customized based on the retrieved SIM-card information.
