It would be nice to have a hard key to toggle speaker phone so that when on a call, you can quickly switch back and forth while responding to a text and or an email.

I guess my main use is that I can quickly respond to a message using the keyboard on a phone call without interrupting someone speaking on the other end and still be able to hear him or her. Right now it's somewhat cumbersome to deactivate the speaker phone as you have to wait a beat for the message to send, fumble with the notification bar to get the call back up (or minimize and switch cards), then get back to the button on the dialer app.

Thanks in advance.