Suddenly my screen starts flickering, stroboscopic effects. Did a factory reset. Works for a while. Only few apps installed. Phone is not even 2 years old. Is this still under warranty? 

It seems the camera app does what ever it wants.  When auto scenery mode is off, I can not select the manual scenery mode.  If I'm lucky I can select the scenery mode in Photo Mode. Changing to Beauty Mode. In beauty mode scenery is disenabled. Back to Photo Mode. Scenery is disabled. Can't select a...