I have a K800i, when I receive a call and I'm hearing Radio or music the phone doesnt ring on the headsets, is this possible to do on SOnyEricsson phones?

I have always used Nokia phones, and these phones rings on the headsets and on the loudspeaker at tthe same time

any patch ?Pls, DONT ask why I would like to do it, I just want i to, like maybe others, thank you !