A method to tag a host rendering device by using a portable multimedia processing device configured to grant access to conditional access multimedia content provided by a specific operator. The multimedia content is rendered by the host rendering device that is connected to the portable multimedia processing device via a communication link. The portable multimedia processing device stores operating specific data comprising an operator identifier and a portable multimedia processing device identifier. This operator specific data is transmitted to the host rendering device to be stored in a non-volatile memory, the host rendering device thus becomes tagged with the operator specific data. The disclosure further relates to a dongle to be connected via the communication link to the host rendering device including a television set, the communication link including a USB link or a HDMI link or a combination thereof. The dongle tags the television set with its identifier and the identifier of the operator.