about that! I had the same issues some time back n I had to submit my fon in the service center n I got my fon back after 40 odd days..n now again after 3 months m facing same issues with the screen where u  see shadows of recently used apps or vdos n tis just d start last like last time. I even updated it to latest flyme version but the prob persists.last time when it happened my fon was still in warranty but now d warranty is over n I dunno how it'll cost to change d screen..hopin to sell it.