Some challenges foreseen in 5G technology

In this study, it is emphasised on current and possible problems of 5G technology which is going to come our lives in the near future and makes many innovations. Especially, it is mentioned some technical problems caused by the transition to millimeter waves (Millimeter wave, massive MIMO, small cells and security and health and standardization tasks which are less mentioned presently. In this context, it is aimed to call attention to possible problems with the proliferation of 5G and some comparisons are made time to time between 4G and 5G.