Hai guys many of you are facing problems in ending your call after your talking with someone that you cant cut down the call quickly here is a method which would be helpfull for you check this out and leave a reply
4.if a dialog box comes that you do not have an accessible application click on "cancel"
5.Click on "the power key ends call "
and you are done now you can cut the call quickly by pressing power key
note this doesnt work in loudspeaker mode.....