Mobile device for wireless data communication and a method for communicating data by wireless data communication in a data communication network

A method for communicating data by wireless data communication in a data communication network, the method comprising steps of:

• providing a mobile device, the mobile device comprising a central data processing unit, a memory unit, a display element, a user interface, a power supply unit, and a wireless transceiver configured for wireless data communication using the same frequency ranges of the sub 1 GHz frequency band for both sending and receiving data, wherein each of the functional units being functionally connected to at least the central data processing unit;
• providing a data communication unit configured for at least unidirectional wireless data communication in the sub 1 GHz frequency band;
• and
• in the data communication network, communicating data signals between the mobile device and the data communication unit by wirelessly transmitting the data signals in the sub 1 GHz frequency band.