Since the last update (three days ago), the M app keeps pushing itself to the foreground. Every time I activate my smartphone, the M app opens instead of the start page??? The real problem, however, is that I can no longer answer calls. When I make a call, I only see a black screen.... unfortunately only for about a second a small window on the right side with three symbols?? of which a big "M" unfortunately too short to take a screenshot. I have tried everything possible, including restarting, unfortunately there is no option in the M app: "Settings" like everywhere else. It is quite embarrassing to call back first after every call and explain to people where the problem is, because it actually sounds like a FAUL excuse. Please help me quickly, as I am afraid that I will no longer be taken seriously by various people. thank you in advance. samuel Schüle