Battery in my Huawei phone swelled just before the warranty period. They have replaced it for free, but have also incorrectly plugged the touchscreen connector, and the phone started detecting phantom touches in one screen area. I have tried to fix it, but I did not notice that there are two connectors to the front glass and I was reconnecting the display. I ended up buying another phone, and later fixed the broken one, but it still lays, fully functional, in the drawer.