[AC Question]

My SGS4 is opening apps, clicking on things and taking pictures etc without me even touching the screen. It is like its possessed. The bottom two corners are unresponsive to touch. I did the test screens and turned on that little white dot that shows where on the screen you are touching, but I am not touching the screen, and there are a bunch of those little white dots flying all over the screen opening things and vibrating. I recently had my screen replaced, could this be the problem?

[Rukbat]

I recently had my screen replaced, could this be the problem?

It is the problem - your screen (the digitizer, specifically, is defective. If you had the replacement done by a shop, the repair should be guaranteed.