Today, in the 9th ScienceBeer, Mohammed was our Science Brewer. Mohammed is a PhD student in TU-Dresden and works on Mobile Communications Systems. In the 9th ScienceBeer he explained us how until few years ago, full-duplex communication in wireless networks assumed to be even impossible. But now it is possible and in the next generation of the mobile networks (5G) we should expect extremely higher speeds than before. Mohammed also told us amazing facts about the mobile networks and current challenges. Beside that, now we even know how to find the right angle to recieve most radio frequencies. Thank you Mohammed.