I think I have to start planning for a replacement mobile device. It could either be a smartphone or a tablet. It doesn't matter which as I only use it for reading e-books and for transferring pictures from my camera to my PC - no calls.
I have already replaced the screen on my smartphone once but symptoms of pending trouble is brewing again. A dark halo has appeared on the edge of the screen, like last time, for quite sometime now. Quite clearly, some circuitry has gone bad on the phone and its not worth maintaining anymore.