The present disclosure relates to a method performed in a network server of a service provider providing a service comprising media streaming. The method comprises receiving a detection message from a mobile radio device running the service for a user registered with the service provider, said message comprising an indication that said radio device has detected a radio transmitter as well as comprising an identifier of said radio transmitter. The method also comprises determining that the radio transmitter, as identified by the received identifier, is registered with the service provider and associated with one or more actions. The method also comprises electing an action of the one or more actions. The method also comprises sending an instructions message to the radio device, said message comprising instructions to modify the service such that the radio device performs the elected action.