How long is the delay for the screen to go off while on speaker? I just tried it sitting at my desk and listened to my answering machine at home for about 30 seconds or so and the screen didn't black - so I'm not sure if mine does or not, or what setting I might have enabled to either delay or avoid the screen blacking out while on speaker.
But still, it seems like this feature would be a big negative. When the call is done, you would then have to go through two actions to end the call- press the power button to light the screen, then press the end call bar. If you're on speaker phone in the car, (which is where I would often use it) this is a stupid potential distraction.
I suppose you could set the phone so that the power button ended the call - therefore just one distracting touch. But then what if you were on a regular speaker call at home or office and wanted to simply multi task by sending a text, or looking something up on the web?