I got a question, Is there any Lumia 900 facing a problem whereby whenever you play songs, videos, your 3 main buttons will hang or become unresponsive. Anyone have anyway to solve this problem? i bought this phone second hand and the warranty is over. Just would like to know if any lowyatians have any solution to this issue?

Thank You very much! It worked! Those having such problem can refer to the solution as mentioned by pomen_GTR.