In a mobile device with a processing unit, main memory, display memory and display, a context module identifies a user-context, a determiner module determines correspondence or non-correspondence of data images in the main memory to the user-context, a first selector module selects corresponding data images for access by the display memory in case of correspondence, a second selector module select data items in case of non-correspondence, a transformation module transforms selected data items to corresponding data images and stores them in the main memory, and an access module lets the display memory access the selected data images.