I just tried it and it work well , i got the S7 edge and i went from native resolution and ppi density to 1080x1920 and lower ppi it make me lose my edge screen but it make everything lag free and battery consumption please use this at your own risk! What you need : a Rooted Phone or tablet with higher resolution than 720p, and a terminal emulator! I found out you can tweak the resolution on your device. I'm sure some of you are familiar with DPI changes, but this actually makes your phone work on 1080p or lower resolution than QHD , Open terminal and write the following! don't forget you need ROOT access! "su" "wm size 1080x1920" "wm density 480" "stop && start" (for restart) I used a DPI of 480 because that's the 1080p equivalent of my phone's stock 640 on 1440p. If you want to know your original resolution type those following to know the value , "wm size" "wm density" and it will tell you what they are and the current override. just do it again to re-change your value to default. Enjoy a faster phone and less battery consumption!