The present invention relates to a method for operating mobile terminal devices and to mobile terminal devices having the capability of communicating via different radio communication connections. The invention relates to the selection of radio transmission channels especially in the field of mobile online gaming. The invention provides a method for selecting a carrier for wireless communication of a mobile electronic terminal device that can execute wireless online game applications by exchanging communication data with at least one remotely located device by using any of a plurality of distinct communication carriers. The method of the invention comprises wirelessly executing an online game application, retrieving a latency time period requirement for the game data transmissions for said executed online game application, determining available communication carriers for wireless communication, determining which of the available communication carriers is appropriate for the intended wireless communication based on latency time requirements of the executed wireless online game application, and selecting at least one of said available and appropriate communication carriers fulfilling said latency time period requirement for bearing the data transfer for said online game.