Mobile devices have potential to be integrated into the classroom, because they contain unique characteristics such as: portability, social interactivity, context sensitivity, connectivity and individuality. Adoption of LMS by students is still on the low rate, mostly because of poor usability of existing eLearning systems. Usability issue is rising to the higher level on mobile platform, due to device limitations and also because of context of use. Our hypothesis was that it is wrong to take a mobile device as a surrogate for desktop or laptop PC. By accessing LMS on mobile devices using adaptive technologies, like Google proxy, we didn’t acquire the satisfactory results. Possible solution to the problem could be development of rich client applications for today mobile devices that would improve usability. Results gathered in usability research conducted among students have confirmed that development of eLearning systems needs to have learner in the center of development process.