Smartphones determine our everyday life. Always. More. Everywhere people stare at their mobile phones. Often in the middle of conversations with other people. A study by the University of Bonn in Germany has shown that mobile phone users switch on their smartphones 88 times a day on average and unlock their mobile phones 55 times a day. According to a survey by the German Digital Economy Association (BVDW), smartphones are used by people between the ages of 16 and 34 for around 80 minutes a day.