Install Fails in normal and advanced Mode: I always get a Dead Android with Message “Fehler” (Error). No Error Number at all. Different WLAN (at home and at Work). Had to switch off by pressing 10 seconds Power Button (or waiting about 2 Minutes then the Phone starts by itself). I really don’t know why updates fail since Androis 6 (had also massive Problems when installing Androis 6). I Think i just wait till someone find a fix, today i don’t have time to test more.