Im suffering from flickering screen issue on my lumia 920, but this was there even before amber update. To reproduce the issue , i found this way - Make a call and put your finger near proximity sensor so that screen goes off. Stay like that for 2 to 3 minutes and now take out your finger. You will see that entire screen is flickerng. But this is not the only cause for flickering screen, as i observed it coming many times in my usage. Nokia plzz respond to the question quickly. Guys tell me how many of u are also suffering from similar problem.