I'm having problems with my new Xiaomi MI2S (genuine as far as I can tell). Regularly, the phone shuts down and won't restart. The only way to fix it is to remove the battery and put it back in. After that, the phone starts up as usual again. The problem only seem to get more frequent. To me, it seems like it simply can't get any power as putting it in the charger doesn't do anything. However, the battery seem to be in place, so I'm not sure it's simply the battery being loose. Has anyone else had similar problems and is there a known fix?