When I open most of the applications (whatsapp, line, wechat, facebook messenger ) then close it, it shift to the screen which only showing background with nothing else (as shown in picture 1) everytime, it is no reaction although I press all the keys except shut down the mobile, so I can do nothing except restart the mobile in this moment. After few minutes, it will shift to the screen which the heading shown "Notification" (as picture 2)but nothing shown in this notification screen and no reaction when press all the keys except press the end key.
How the problem can be fixed? Is it the problem of the applications or the mobile ? Because it is annoying that I need to wait 4-5 minutes for the phone to deal with this process.
Please, dial *#0010# to determine which firmware version do you have.
Furthermore, what is the name of that theme you are using because that is non-standard, isn’t it?