Answer to "Why is my phone switching on and off by itself?"For no reason my phone (Huawei Y7 Pro 2019) just starting to switch on and off repeatedly. It was working fine the one minute and the next minute just switched off and then on again. It stays on for about 5 seconds and then turns off again and then on again. And so it keeps repeating the process. I was just watching videos at youtube. I tried restarting, and tried power off with no success. I then took the SD card out but the phone keeps doing the same. When I remove the SIM card then it stops switching on and off, so it seems that the problem is with the SIM card. Is that even possible? Please advice urgently if there is anything that I can do.