hello. I am new here, but had to register because I wondered maybe some one had the same problem. The situation is like this, when i bought the phone it worked fine, and i updated to latest version of android 4... smthn.... And now it works fine, but the problem is when I lock my phone - it goes to sleep mode and while the display is black, periodically it flashes back up, like i am touching it or pressing some button while it is locked. So any1 had this problem? It starts to annoy me... Or maybe it is phones malfunction and i should give it back and replace it?