This big, botox-deep frown line goes out to all makers of all mobile telephones in the United States of America. The manufacturers are ignoring and continuing an evile design flaw which has surely destroyed lives. Yes, lives!
That flaw is...! It is that in non-flip phones, "locking" the keys doesn't mean the keys are "locked." The phone can still be accidentally answered by the unwitting holder of the phone. It's evile!
Consider a recent Dr. Laura phone call... the woman called to tell Dr. L that she had overheard her husband on a date with another woman. Worse, he complaining about his wife (her!) to this woman! Dr. Laura was quite puzzled. "How did you hear this?" The woman explained that she simply called her husband, and the phone answered (even though he did not say "hello?") and the line was held open for the entire date while the angry Mrs. listened. Dr. L just didn't understand how this could have been and only barely seemed to believe what the woman said but finally took it at face value.
Ahh, MWB understands what happened. The keys were "locked." The phone was in his pocket, probably on silent. He probably shifted one millimeter to pick up his salad fork and voila! The phone answered! And NOW the goddamn cell phones keys are locked and so it doesn't disconnect, and his wife can hear everything.
So I say, to hell will go the cell phone designers who allow this to continue. So I say, buyer beware! Especially those up to some nefarious behaviors... your cell phone in your briefcase, pocket, purse, or car can shift while it's ringing with keys locked and answer itself. Demand change! Call your provider!