For more than a month now, my Galaxie S5 smartphone automatically switches off when I'm in the middle of a call and restarts. This happens about three times a day and I imagine it's a wrong setup. I already searched but nothing I found wrong. However, my computer knowledge is not a big deal, either. I am avoiding taking technical assistance because I depend on it for my work. Is it possible that this could be a configuration problem? Or a defect? Or is it most likely a virus? Thanks for any assistance.