Not having that issue here. But over the years I've found that not every 3.5 headphone jack fits the same. There might also be a difference (eg headsets with talk + media control etc) in the number(3/4/?) of physical connect/function sections which affects how the phone receptor jack fits the headphone plug. Try another set of headphones to see if they fit differently/more snugly? And of course any propietary phone brand headphones(no names) is likely to fit less securely than standard issue ones.