I just got a Samsung Focus, and for mobile handheld computing purposes, I love it. Unfortunately, I can't use it to make calls, because I can't end them. If I make a phone call, the screen goes blank as soon as I start the call. None of the buttons work, and the screen is completely unresponsive. If my intended caller answers, it's not really a problem, because they can end the call, but if not, I either end up leaving really, really long voicemail messages or listening to the phone ring ad nauseum. As far as I can tell, this isn't something I'm doing. As soon as I try to start the call (pull up a contact and hit "Call mobile"), the screen goes blank and the phone is unresponsive until the call is ended. As soon as the call's over, I can hit the button on the side to reactivate the screen, unlock it, and the phone works fine again. I see where this problem came up about a month ago, but the solution posted there (a complete reset to factory settings) doesn't seem to work for me.