This morning on my Blackberry storm 2, i tried going to media player, but it wouldn't play it said ' phone active', but i wasnt calling anyone as far as i know, i went to application running & tried to close phone didn't work, then i just left it and in the evening i tried to call some and it still said, cant connect call in progress so then i had to take battery out and put it back in then it was OK !! Any idea why this happened ???