This really sucks since many times the screen of the xperia lags and I end up waiting ages to get the damn call ended.
Even more, if someone's phone is turned off, I get a message like "beinge redirected to the voicemail and will be chargable after the beep" and if I can't get the damn phone turned off before that beep I pay for the call!!!

this really sucks, is there no way to use the power button to end calls like it was before?