you cannot select speaker phone, close it and use it. However if you plug a headset in close the phone and unplug the headset the speakerphne will work while the phone is closed. So if you unplug your headset it will not hang up it will switch to speaker phone mode with the phone clsoed. On another note why wouldn't you take advantage of a bluetooth headset? that is one of the things that make this phone great.